2)4x-1=7x+8
3)2(3x+2)-3(x-1)=13
4)4(5x-1)-2(3-2x)=10

2)-3x=9

    x=-3

3)6x+4-3x+3=13

  3x=6

  x=2

4)20x-4-6+4x=10

  24x=0

  x=0

Объяснение:

2)

4х - 1 = 7х + 8

4х - 7х = 8 + 1

-3х = 9

х = 9 : (-3)

х = -3

3)

2(3х + 2) - 3(х - 1) = 13

6х + 4 - 3х + 3 = 13

3х + 7 = 13

3х = 13 - 7

3х = 6

х = 6 : 3

х = 2

4)

4(5х - 1) - 2(3 - 2х) = 10

20х - 4 - 6 + 4х = 10

24х - 10 = 10

24х = 10 + 10

24х = 20

х = 20 : 24

х = 20/24

х = 5/6