16 + 3(3x - 4) = 4x - 1916 + 9x - 12 = 4x - 199x + 4 = 4x - 199x - 4x = -19 - 45x = -23x = -23/5
13 - 4(6 + 5x) = 3(7 - 5x)13 - 24 - 20x = 21 - 15x-11 - 20x = 21 - 15x-20x + 15x = 21 + 11-5x = 32x = -32/5
16 + 3(3x - 4) = 4x - 19
16 + 9x - 12 = 4x - 19
9x + 4 = 4x - 19
9x - 4x = -19 - 4
5x = -23
x = -23/5
13 - 4(6 + 5x) = 3(7 - 5x)
13 - 24 - 20x = 21 - 15x
-11 - 20x = 21 - 15x
-20x + 15x = 21 + 11
-5x = 32
x = -32/5