To a one dimensional equation, a detailed process, and more importantly, not to plagiarize! I hate p

I'll give you the detailed process, it's not written like an equation.

Solution: Let A and B be separated by x kilometers.

Time from A to B: (x 12).

Time from B to C: 55 60 hours - (x 12).

The distance between B and C is: (55 60-x 12)*9

From C to B, time: (55 60-x 12)*9 8 From B to A, time:

B A distance: [.]

This gives the equation that the equiquantity relation is the distance of A and B, and their distances are always equal.

6-(11/12-x/12)*9/2=x

6-x=(11/12-x/12)*9/2

2(6-x)=9(11/12-x/12)

12-2x=33/4-3x/4

48-8x=33-3x

8x-3x=48-33

5x=15x=3

A: A and B are 3 kilometers apart.

It can also be answered by a binary one-time solution.

Let the distance of A and B be x, and the distance of B and C be y

x/12+y/9=55/60→3x+4y=55/60*36=33x/4+y/8=

Substituting into 3x+4*12-8x=33 results in x=3y=6

Answer: The distance between A and B is 3 km, and the distance between B and C is 6 km.

Let it take x minutes to get from A to B and y minutes to go from B to C. Rule.

x+y=55

3x+9/8y=90

So 15 8y = 75 y = 40 x = 15

Therefore, the distance between A and B is 12 60*15=3 kilometers, sorry I didn't see the problem clearly, and I used a binary equation.

If there are x copies of an 8 yuan book, then there are 105-x copies of a 12 yuan book 8x+12 (105-x)=1500-4188x+1260-12x=1082

4x=1260-1082

4x=178

x= $8 book has a book, then $12 book has a book.

Books can't be decimals, from buying a notebook that doesn't exceed 10 to see that there are 45 books for 8 yuan and 60 books for 12 yuan.

The unit price of a notebook may be: 1082-8 45-12 60 = 2 yuan.

Set 8 yuan to buy x book, 12 yuan to buy y book, notebook ** for z yuan.

Then: x+y=105 (1).

8x+12y+z=1500-418=1082 (2)

2)-8*(1)：4y+z= 242

y= y is an integer, z<10 z 4

x=take i=0,z=2, x=45 y=60, take i=1,z=6, x=46 y=59The unit price of a notebook may be 2 yuan, or 6 yuan. If it is 2 yuan, buy 45 books for 8 yuan, and buy 60 books for 12 yuan; If it is 6 yuan, 46 books for 8 yuan and 59 books for 12 yuan. It is easy to judge which one is based on the invoice or the current price situation.

If a book with a unit price of 8 yuan is x, then a book with a unit price of 12 yuan is 152-x, so:

8x+12(105-x)≦(1500-418)；

Solve x ;

If x=46, then the total cost of buying books is 8*46+12*(105-46)=1076 yuan, and the remaining 1500-1076=424 yuan;

Notebook unit price = 424-418 = 6 yuan;

If x=47, then the total cost of buying books is 8*47+12*(105-47)=1072 yuan, and the remaining 1500-1072=428 yuan;

Notebook unit price = 428-418 = 10 yuan; Obviously, it is inconsistent with the unit price of the notebook less than 10 yuan;

Therefore, the unit price of the notebook is 6 yuan;

Suppose you buy book A and book x, then book B (105-x.

1072<8x+12(105-x)<1500-418x=45,46

So c = 2,6

Solution: Set the unit price of the notebook to be X yuan. The two books were bought with y and (105-y) respectively, and the solution from the title was 8y+12(105-y)+x=1500-418, and x=2 or 6 was solved

Answer: When the number of books is 45 and 60, the unit price of the notebook is 2 yuan;

When the number of books is 46 and 59, the unit price of the notebook is 6 yuan.

Let the speed of the ascent be xkm h and the speed of the descent.

The distance up and down the hill is the same, so you can make an equation)

1 (1 hour) * x (uphill speed) + 1 (1km left) = downhill speed) x 5 6 (50 minutes).

The distance on the left is the distance up the mountain = the distance down the mountain on the right).

x=4 so the speed up the hill is 4km h, and the speed down the hill is 1*4+1=5km for a one-way trip. In parentheses are comments Don't copy them.

Having a problem with a one-dimensional equation?

Explain that Xiao Ming's mother's salary income is x yuan, which is known from **analysis x 2000

Then 500 5%+(x-1500) 10%=135, that is, 25+(x-1500) 10%=135

i.e. (x-1500) 10%=110

The solution is x-1500=1100

The solution is x=2600

It's so hard, I'm blindsided, and then I thought about it. It's very easy to do The solution is a one-dimensional equation but there are two unknowns Take a good look Solution: If the unit price of the notebook is a yuan, and if you buy a book x for 8 yuan, you will buy a book (105-x) for 12 yuan.

Next up is the column equation. a+8x+12(105-x)=1500-418 x=44+a 4 That's the key: 44+a, 4 is an integer, a 4 is an integer, that is, a is a multiple of 4, and a 10 a=4 or 8, the unit price of a notebook is 4 yuan or 8 yuan. Is that right?

In fact, there is nothing difficult about this math, just be active in your thinking. I'm so tired, I've typed so many words, give points. 55555）