Xiao Fang found that the prices of a certain brand of Walkman and schoolbag were the same in two sup

If the unit price of the schoolbag is X yuan, the unit price of the Walkman is 4x-8x+4x-8=452 yuanx=92, so the unit price of the schoolbag is 92 yuan, and the unit price of the walkman is 452-92=360 yuan

x=300 so: 200 x 300 b supermarket is more economical when 300 x 400a:: x=450 so 200 x 300 b supermarket is more economical when x=100 a:

Yuan B: 100-30 = 70 yuan B supermarket is more economical when X = 200 A: Yuan B:

200-60 = 140 yuan B supermarket is more economical when x = 300 a: yuan b: 300-90 = 210 yuan b supermarket is more economical when x = 400 a:

Yuan B: 400-120 = 280 Yuan B supermarket is more economical.

This is normal, called unification**.

What are you looking for help?

Solution: (1) Set the unit price of the schoolbag to be X yuan, then the unit price of the Walkman is (4x-8) yuan According to the title, get 4x-8 + x=452, and the solution is: x=92, 4x-8=4 92-8=360 Answer: The unit price of the schoolbag is 92 yuan, and the unit price of the walkman is 360 yuan (2) It costs cash to buy a Walkman and a schoolbag in supermarket A: 452 80% = yuan).

Because, you can choose supermarket A to buy

In supermarket B, you can spend 360 yuan in cash to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a school bag, and spend a total of 360 + 2 = 362 (yuan).

Because of 362 400, you can also choose to buy at supermarket B Because of 362, it is more economical to buy at supermarket A

Solution: The unit price of the schoolbag is x yuan, and the unit price of the walkman is y yuan according to the question, {x+y=452,y=4x-8, solve this equation, get {x=92y=360, answer: the unit price of the walkman that the student likes is 360 yuan, and the unit price of the schoolbag is 92 yuan;

2) It costs cash to buy a Walkman and a schoolbag in supermarket A: 452 80% = yuan), you can choose supermarket A to buy, in supermarket B you can spend 360 yuan in cash to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a schoolbag, a total of 362 (yuan), 362 400, you can also choose to buy in supermarket B

362, buy more money at supermarket A

1.School bag 92, Walkman 360. 2.Over 100 minus 30 more saving.

Question 1 is 92 and 360.

Question 2 is more money saved at Merchant A.

Solution: (1) Set the unit price of the walkman x yuan, and the schoolbag y yuan.

By question x+y=452

4y-8=x

The solution is x=360 y=92

2）1.Buying at a supermarket costs 452*

2.Buy at supermarket B costs 452-30*4=332 less than so buy at supermarket b.

If you can choose from both supermarkets.

3.Buying a walkman at supermarket A and a schoolbag at supermarket B costs 360*4Buying a school bag at supermarket A, buying a walkman at supermarket B costs 92* Finally, comparing the four cases, it is obvious that the second one costs the least.

Are you ** person? Jiangsu Jiangyan?

The unit price of the schoolbag is X yuan, and the unit price of the Walkman is 4x-8 yuan.

According to the title, 4x-8+x=452 is obtained

Solve this equation to get x=92

4x-8=360

Answer: The unit price of the walkman that the student likes is 360 yuan, and the unit price of the schoolbag is 92 yuan.

a；400 - (360 + 92) times 80% = yuan.

b；400-((360 100)x30+2+360)=38 yuan (plus 2 is because the 90 plus 2 at the wavy line is the money of the school bag).

The end result is the money left, not the money used.

1.A is a learning machine, B is a school bag.

a+b=452

a=452-b

4b-a=8

4b-(452-b)=8

5b=460

b=92a=452-92=360

2.A Supermarket: 452 x 75% = 339 B Supermarket: 452- 4x30 = 332

B supermarket is more cost-effective.

All the same, the total price is the same.

Solution: (1) Set the unit price of the schoolbag to be X yuan, then the unit price of the Walkman is (4x-8) yuan According to the title, 4x-8+x=452, the solution is: x=92, 4x-8=4 92-8=360

Answer: The unit price of the schoolbag is 92 yuan, and the unit price of the Walkman is 360 yuan 2) It costs cash to buy a Walkman and a schoolbag in supermarket A: 452 80% = yuan) Because, you can choose supermarket A to buy

In supermarket B, you can spend 360 yuan in cash to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a school bag, and spend a total of 360 + 2 = 362 (yuan).

Because of 362 400, you can also choose to buy at supermarket B Because of 362, it is more economical to buy at supermarket A

Solution: (1) The unit price of the schoolbag is X yuan, and the unit price of the Walkman is (4x 8) yuan. According to the title, yes.

4x 8+x=452, solve this equation to get x=92

4x 8=4 92 8=360 (yuan).

2) Buying a Walkman and a school bag at supermarket A costs cash:

452 80% = yuan).

Because it < 400, it can be purchased at supermarket A.

In supermarket B, you can spend 360 yuan to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a school bag, a total of 360 + 2 = 362 (yuan) in cash

Because it is 362<400, it can also be purchased at supermarket B.

Because of the 362 >, it is more economical to buy at supermarket A.

Answer: (1) The unit price of the walkman and the schoolbag are 360 yuan and 92 yuan respectively.

2) Save more money when buying at supermarket A.

If the unit price of the schoolbag is X yuan, the unit price of the Walkman is 450-x yuan.

1) According to the title, get 5x-30 450-x; 5x+x＝540450+30；Get x 80;The unit price of the schoolbag is 80 yuan, and the unit price of the walkman is 450-80 370 yuan;

It is more appropriate to buy it at store A.

Solution: (1) Set the unit price of the schoolbag to be X yuan, then the unit price of the Walkman is (4x-8) yuan According to the title, get 4x-8 + x=452, and the solution is: x=92, 4x-8=4 92-8=360 Answer: The unit price of the schoolbag is 92 yuan, and the unit price of the walkman is 360 yuan (2) It costs cash to buy a Walkman and a schoolbag in supermarket A: 452 80% = yuan).

Because, you can choose supermarket A to buy

In supermarket B, you can spend 360 yuan in cash to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a school bag, and spend a total of 360 + 2 = 362 (yuan).

Because of 362 400, you can also choose to buy at supermarket B Because of 362, it is more economical to buy at supermarket A

1) How much is the unit price of the Walkman and the schoolbag that the student likes?

School bag price = (452 + 8) 5 = 92 yuan.

Walkman price = 92 4-8 = 360 yuan.

2) One day, the classmate went to the street, just in time to catch up with the merchant **, supermarket A all goods are sold at a 20% discount, and supermarket B is sold with a shopping coupon of 30 yuan after shopping over 100 yuan (less than 100 yuan is not refunded, and the shopping coupon is universal), but he only brought 400 yuan, if he only buys these two items in a supermarket, you can show that he can choose.

If you buy it all in supermarket A, the total cost is 452 yuan.

If you buy it all in supermarket B, buy a walkman first, turn it into 360 yuan, get a coupon of 90 yuan, and then buy a school bag, and use the coupon to spend 2 yuan. It cost a total of 362 yuan.

Solution: (1) Set the unit price of the schoolbag to be x yuan, then the unit price of the walkman is (4x-8) yuan According to the title, 4x-8 + x = 452, solution: x = 92, 4x-8 = 360

Answer: The unit price of the schoolbag is 92 yuan, and the unit price of the Walkman is 360 yuan (2) It costs cash to buy a Walkman and a schoolbag in supermarket A: 452 80% = yuan).

Because, you can choose supermarket A to buy

In supermarket B, you can spend 360 yuan in cash to buy a walkman, and then use the 90 yuan coupon you get, plus 2 yuan in cash to buy a school bag, and spend a total of 360 + 2 = 362 (yuan).

Because of 362 400, you can also choose to buy at supermarket B Because of 362, it is more economical to buy at supermarket A

Let the price of the Walkman be x the price of the schoolbag be y

So x+y=452

x=4y-8 gives x=360 y=92 in store A 452 * = (yuan).

In shop b because 360>3*100

So get three shopping vouchers ($90 in cash).

Because y=92 yuan.

So you only need to add another 2 yuan to buy Y.

Total 360+2=362 (yuan).

So buy it at store B.

……It's useless now......

Anyway, it's over the exam

(1) Set the Walkman as X and the schoolbag as Y

x+y=425

4y-x=8

x=360 y=92

2) A supermarket 452*, the actual hand remaining

B supermarket buy x first, 360 back 30 * 3 = 90 coupons, there is 40 yuan in cash left, plus 90 coupons.

Use a coupon of 90 plus 2 yuan in cash to buy, and the remaining cash is 38 yuan.

So buy in A.

Tossing like this for 4 cents is really bitter for our flowers.

(1) If the unit price of the schoolbag is X yuan, the unit price of the Walkman is 4x-8 yuan, x+4x-8=452

x=924x-8=4*92-8=360

2) Supermarket A 20% off sales: 452 * yuan).

Supermarket B over 300 rebates 90 (buy a walkman first, and then use a coupon to buy a school bag): 452-90 = 362 (yuan).

He can buy it in both supermarkets and save more money at supermarket A.

A 92 A 360

It's cheaper to buy it at store A.

(1) If the unit price of the schoolbag is X yuan, the unit price of the Walkman is 4x-8 yuan, x+4x-8=452

x=924x-8=4*92-8=360

2) Supermarket A 20% off sales: 452 * yuan).

Supermarket B over 300 rebates 90 (buy a walkman first, and then use a coupon to buy a school bag): 452-90 = 362 (yuan).

He can buy it in both supermarkets and save more money at supermarket A.

(1) Schoolbag (452 + 8) (4 + 1) = 92 yuan, Walkman 452-92 = 360 yuan.

2) Supermarket A, supermarket B buy the Walkman first.

360 300, 90 yuan back, that is, 360-90 = 270 yuan, 400-270 = 130 yuan left, and then buy a school bag, he only needs to take 2 yuan in cash and 90 yuan coupons, cash remaining 130-2 = 128 yuan, the actual cost is 400-128 = 272 yuan.

So you can buy it anywhere, but you can save money at supermarket B.

(1) The unit price of the schoolbag is X yuan, so the unit price of the Walkman is (4x-8) yuan x + (4x-8) = 452

The solution is x=92, so (4x-8)=360

So the unit price of the Walkman is 360 yuan, and the unit price of the schoolbag is 92 yuan (2) If you buy it in supermarket A, you need 452 80% = yuan If you buy it in supermarket B, you can buy a walkman for 360 yuan first, return 30 yuan shopping coupons, and use 30 yuan shopping coupons + 62 yuan to buy a schoolbag, but he only has 40 yuan left, and he can't buy a schoolbag.

Therefore, you can only go to supermarket A to buy it.

I don't quite understand your shopping coupon model, buy a 360 yuan walkman, is it only a 30 yuan shopping coupon or a 3 30 yuan shopping coupon, the above is only a 30 yuan shopping coupon situation, if 3 30 yuan shopping coupons, then you only need to take another 2 yuan to buy a school bag, so you need to spend 362 yuan in the supermarket B. It is still greater than the yuan, so it is still the choice of supermarket A

(1) Answer: Walkman 360 yuan; School bag 92 yuan.

2) Answer: It is more economical to buy at supermarket B.

The process and reasons are explained as follows:

1) Assuming that the ** of the schoolbag is y yuan, then the ** of the walkman is (4y-8) yuan.

According to the meaning of the title, y+(4y-8)=452

The above equation solves y=92

That is, the unit price of the schoolbag is 92 yuan, and the unit price of the walkman is equal to 4 * 92-8 = 360 yuan.

2) If you buy it at supermarket A, then the total amount spent is 452* yuan.

If you buy it at supermarket B, then the total amount spent is 452 - (4 * 30) = 332 yuan.

So, buy it at supermarket B to save money.

The title of the second sub-question, "But he only brought 400 yuan" is very confusing. You can just ignore him. Let's just assume that your money is sufficient.

Pay 452 yuan first, and then the supermarket will return 120 yuan. So it only cost (452-120) yuan, that is, 332 yuan.

1) Assuming that the ** of the schoolbag is y yuan, then the ** of the walkman is (4y-8) yuan.

According to the meaning of the title, y+(4y-8)=452

The above equation solves y=92

That is, the unit price of the schoolbag is 92 yuan, and the unit price of the walkman is equal to 4 * 92-8 = 360 yuan.

2) If you buy it at supermarket A, then the total amount spent is 452* yuan.

If you buy it at supermarket B, then the total amount spent is 452 - (4 * 30) = 332 yuan.

So, buy it at supermarket B to save money.

I am a math teacher at Beijing Experimental Primary School 6!