Question

解方程2(X-6)=3-(4X-9)、5（Y+5）-3(2-Y)=35、3X-7+6X=4X-8 3(X+1)-(3X-2)=4(X-5)

3分之7X-1-2分之5X+1=2-4分之3X+2

Answer 1

2(x - 6) = 3 - (4x - 9)
2x - 12 = 3 - 4x + 9
2x + 4x = 3 + 9 + 12
6x = 24
x = 4

5( y + 5 ) - 3( 2 - y) = 35
5y + 25 - 6 + 3y = 35
5y +3y = 35 - 25 - 6
8y = 4
y = 0.5
3x - 7 + 6x = 4x - 8
3x + 6x - 4x = - 8 + 7
5x = - 1
x = -0.2

3(x + 1) - (3X - 2) = 4(x - 5)
3x + 3 - 3x + 2 = 4x - 20
- 4x = -20 - 5
4x = 25
x = 6.25
(7x - 1)/3 - (5x + 1)/2 = 2 - (3x +2)/4
方程两边同时乘以12得：
4（7x -1) - 6(5x + 1) = 24 - 3(3x + 2)
28x - 4 - 30x - 6 = 24 - 9x - 6
-2x + 9x = 18 + 4 + 6
7x = 28
x = 4

Answer 2

4
2
-0.2
6.25
4
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