4x + 9 = 33
x = 6
6r + 7 = 13 + 7r
r = -6
-14 + 6b + 7 - 2b = 1 + 5b
b = -8
4n - 40 = 7(-2n + 2)
n = 3
8x + 4(4x - 3) = 4(6x + 4) - 4
No Solution
-3(x - 1) + 8(x - 3) = 6x + 7 - 5x
x = 7