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