There are two kinds of black and white chess, theirs is 4-3, and 9 1 piece has been moved. The ratio of black and white chess is 8 to 5, the remaining ratio is 3 to 4, and there are several black and

There are two kinds of black and white chess, theirs is 4-3, and 9 1 piece has been moved. The ratio of black and white chess is 8 to 5, the remaining ratio is 3 to 4, and there are several black and white chess. Black: 68 white: 5 1

Solution: Suppose: black 7/4x, white 7/3x.

To go: black: 9 1X8+5/8=56.

White: 9 1X8+5/5=35.

(7/4x-56)÷(7/3x-35)=4/3

(7/4x-56)X4=(7/3x-35)X3

7/ 16x-2 16 = 7/9x- 105

7/ 16x-7/9x = 2 16- 105

x= 1 19

1 19 ÷7= 17

White: 17X3=5 1 black: 17X4=68.

Matters needing attention in solving equations

1, denominator first.

2. If there are brackets, remove them.

3. Move the project if necessary.

4. Merge similar projects.

5. The coefficient reaches 1 to get an unknown value.

6. Write "solution" at the beginning.