3x + 4 = 16
3x = 16 - 4
x = 12/3
x = 4
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7x + 16 = 3x + 4 4x = -12 x = -3
-3x+14 = -4 -3x = -4-14 -3x = -18 x = 6
5x - 4 = 3x + 6 5x - 3x = 6 + 4 2x = 10 x = 5
3x - 1 = 11 so 3x = 12 so x = 4, so x^2 + x = 16 + 4 = 20 3x=12 so therefore x=4 x2 + x = 16 + 4 = 20
x = 7 and 2/3