E) 5(x + 6) - 6x = 10
5(x + 6) - 6x = 10
5x + 30 - 6x = 10
5x - 6x = 10 - 30 - x = - 20
x = 20
.
F) 4(x - 2) = 3(x - 1)
4(x - 2) = 3(x - 1)
4x - 8 = 3x - 3
4x - 3x = - 3 + 8
x = 5
.
G) 2(2 - x) + 6 = 3(x - 2) + 16
2(2 - x) + 6 = 3(x - 2) + 16
4 - 2x + 6 = 3x - 6 + 16 - 2x + 4 + 6 = 3x + 10 - 2x + 10 = 3x + 10 - 2x - 3x = 10 - 10 - 5x = 0
x = 0
.
H) 7x - 5 = 4x + 4
7x - 5 = 4x + 4
7x - 4x = 4 + 5
3x = 9
x = 9 / 3
x = 3
.
I) 7x + 2 + 2x = 5x + 6 + 2x
7x + 2 + 2x = 5x + 6 + 2x
7x + 2x + 2 = 5x + 2x + 6
9x + 2 = 7x + 6
9x - 7x = 6 - 2
2x = 4
x = 4 / 2
x = 2
.
J) (x + 12) + 1 = (x - 5) + (x - 3)
(x + 12) + 1 = (x - 5) + (x - 3)
x + 12 + 1 = x - 5 + x - 3
x + 13 = x + x - 5 - 2
x + 13 = 2x - 8
x - 2x = - 8 - 13 - x = - 21
x = 21.