Пошаговое объяснение:
1.
3(x - 2) = x + 2
3x - 6 = x + 2
2x = 8
x = 4
2.
5 - 2(x - 1) = 4 - x
5 - 2x + 2 = 4 - x
7 - 2x = 4 - x
-x = -3
x = 3
3.
(7x + 1) - (9x + 3) = 5
7x + 1 - 9x - 3 = 5
-2x -2 = 5
-2x = 7
x = -3.5
4.
3.4 + 2y = 7(y - 2.3)
3.4 + 2y = 7y - 16.1
-5y = -19.5
y = 3.9
5.
0.2(7 - 2y) = 2.3 - 0.3(y - 6)
1.4 - 0.4y = 2.3 - 0.3y + 1.8
-0.1y = 2.7
y = -27
6.
2/3(1/3x - 1/2) = 4x + 2 + 1/2
2/9x - 1/3 = 4x + 2 + 1/2
(-3 - 7/9)x = 2 + 5/6
-34/9x = 17/6
-68/18x = 51/18
x = -3/4