Elementary 1 math problem, solve, use a one dimensional equation!!

If B sells x knife holders, then sells 50x blades, and the equation is:

1-6）x+（

Solution: x=400

So, B sold 400 knife holders, 20,000 blades.

Profit of factory A: 8000*(yuan.)

Therefore, the profit of factory B is: 4000 * 2 = 8000 yuan.

B's profit from selling knife holders is: (1-5)x

B's profit from the sale of blades is: 50x*(

If B sells x knife holders, then the blades sell 50x pieces.

1-6）x+50x*(

i.e. 20x=8000

x=40050x=50*400=20000A: B sells 400 knife holders and 20,000 blades.

Set: x is the number of tool holders sold by B.

Manufacturer A sold 8,000 razors, and the profit obtained by manufacturer B was twice that of manufacturer A, so the profit obtained by manufacturer B = 8,000 * (yuan.)

The number of blades sold by manufacturer B is 50 times the number of tool holders, so the number of blades sold by B = 50x is known to be available, (1-6) x + (yuan).

That is, -5x+25x=8000

20x=8000

Available, x=400 (put).

So, B sold 400 knife holders, 20,000 blades.

Knife holder x, blade 50x

Profit of manufacturer A: (yuan.)

Profit of manufacturer B: 2 * 4000 = 8000 yuan.

Therefore, (1-6)*x+(

x=400 so B sold 400 knife holders and 2000 blades.

The profit of factory A is (yuan, the profit of factory B is 2 * 4200 = 8400 yuan, if factory B sells x tool holders, the number of blades sold is 50x, and the equation (1-5) x + (, the solution is x = 400, 50x = 20000, so factory B sells 400 knife holders and 20000 blades.

Question 1: Set up a small flag x side. Find the equation: The result is a day and a half ahead of schedule. The equation is obtained:

x 40 x 180 sides.

Question 2: "A single digit is 3 times more than a 10-digit number" is not clear.

Question 1: If you make a total of x faces, the original time is x 40, but now it is (1 3x) 40 + (2 3x) 80, then.

x/40-[(1/3x)/40+(2/3x)/80]=3/2

Solution x=180

Note: Originally, only half of the students made 40 noodles a day, and later the whole class made 80 noodles.

Question 2: If the ten digits are x, then the hundred digits are x+1, and the single digit is 3x-2, and the three digits are 100 (x+1) + 10x + (3x-2) = 113x+98

Upside down is 100 (3x-2) + 10x + (x+1) = 311x-199, so there is.

113x+98+311x-199=1171

The solution is x=3, so the number is now 734

Xiaohong said: "I have four cards in my hand, which are written 8,3x+2,1 2x-3,1 x. Xiaoli said, "If I connect the numbers or formulas on any two of these four cards with an equal sign, I will get an equation or a one-dimensional equation." ”

1) How many equations can Xiaoli write in total? Write them separately.

8=3x+2;

8=1/2x-3;

8=1/x;

3x+2=1/2x-3;

3x+2=1/x;

1/2x-3=1/x;

6 in total; (2) Which of these equations written by Xiaoli are unary equations?

8=3x+2;

8=1/2x-3;

These two are.

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1) Six.

8=3x+2

8=1/2x-3,8=1/x

3x+2=1/2x-3,3x+2=1/x

1/2x-3=1/x

2）8=3x+2

8=1/2x-3

is a one-dimensional equation.

Set the barrel depth to xcm. Rule.

x (1-1 3) + x (1-1 5) = 55 to get x = 20

The barrel depth is 20cm.

Solution: The long one is x centimeters, then the short one is (55-x) centimeters x (1-1 3) = (55-x) (1-1 5) x = 165 8

x = 30 depth in the barrel: 30 (1-1 3) = 20 cm.

1 All 1Suppose that after x months, the use time of this computer reaches the specified maintenance time: 2450 hours: 1700 + 150x = 2450

x=52.Length x width is one-third of length = 1 3x2 * (x + 1 3x) = 80

x=303.Let the first number be x, and the rest are x+2, x+4, x+6x+x+2+x+4+x+6=32

The four numbers x=5 are 5, 7, 9, and 11

4.He also hit x two-pointers and made free throws 14-3-x=11-x3*3+2*x+(11-x)=28

x=8 He also hit eight two-pointers and three free throws.

5.The number x on the ten digit, the number 11-x on the single digit, the original two-digit 10x+11-x=11+9x

Swap the number in the tenth digit with the number in the single digit to get a new number 10*(11-x)+x=110-9x

110-9x-63=11+9x

x = 2, the original two-digit number 29

Let the distance be x, and know that A to B will flow from the question.

Then the time from A to B: x (260+2).

Time from B to A: x (260-2).

So::x (260-2)-x (260+2)=3 gives x = 50697 km.

Personally, I think the speed is 260, not 2600, and it is possible.

(1) Get $10,000 yuan in the first year.

x+2x+4x=1400

7x=1400

x=2002) costs $ as well.

x=20+x=100

3) Because (a+1) is to be simplified, the two sides of the equation are equal except for a non-zero number, so a+1 is not equal to 0, so a cannot be equal to -1

4）4x+2y-2=4y+2x

2x+y-1=2y+x

x+y-1=2y

x-1=y, so x is greater than y x than y, and 1 is greater than y

1. If the average weight of the lesbian bridge is x kg, the average weight of the male students is kg;

If the total number of male students is 1, the total number of female students is.

x*2,1), chili pepper wholesale x kg, garlic seedlings wholesale 40-x kg.

x = 10 kg, that is, 10 kg of chili pepper is wholesaled, and 30 kg of garlic seedlings are wholesaled.

2) Yuan. 3. Let it take a total of x seconds, then.

45km/3600s*x*2=

2x=m/6-5/6

x=(m-5)/12

x is an integer, assuming x=1, then m=17

5. Assuming the sales amount of C last year x, according to the title, it can be obtained:

Last year's total sales amounted to: x = ;

Last year's AB sales amount was as follows:

This year's AB sales amount is: =;

This year's c sales amount is:

The sales amount of high-tech product C this year is higher than last year: (i.e. 30%.

1. Let the weight of girls x the number of boys be y, then x*y*shirt, answer: x=442, chicken and rabbit questions: 70-40*6 (garlic sprouts.

3 500 speed to or roll ms

5 30% increase over last year