a) 4 - (5x - 4) = 3x
4 - 5x + 4 = 3x
8 = 3x + 5x
8 = 8x
x = 1
b) 7x + 10 = 5 - (2- 6x)
7x + 10 = 5 - 2 +6x
7x - 6x = 5 - 10
x = -5
c) 5x - ( 4 - 2x) = 2 - 2x
5x - 4 +2x = 2 - 2x
7x + 2x = 2 + 4
9x = 6
x = 6/9
x = 2/3
d) 1 - 6x = 4x - (3 - 2x)
1 - 6x = 4x - 3 + 2x
1 + 3 = 6x + 6x
4 = 12x
x = 4/12
x = 1/3
