Попробуем расскрыть везде скобки
1) (3х-2)=4х
3x - 2 = 4x
3x - 4x = 2
-x = 2
x = -2
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(3*(-2)-2)=4*(-2)
-6 - 2 = - 8
- 8 = - 8
2) 5(У+3)=0
5y + 15 = 0
5y = - 15
y = - 3
3) 3(2Х-7)=9
6x - 21 = 9
6x = 9 + 21
6x = 30
x = 30 : 6
x = 5
4) 6(Z-1)=18
6z - 6 = 18
6z = 18 + 6
6z = 24
z = 24 : 6
z = 4
5) 3(х+6)=2(Х-3)
3x + 18 = 2x - 6
3x - 2x = - 6 - 18
x = - 24
6)9(Х-3)=5(Х+5)
9x - 27 = 5x + 25
9x - 5x = 25 + 27
4x = 52
x = 52 : 4
x = 13