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49x
14x(x + 2)
If you mean: 14x = 129.5 then x = 129.5/14 = 9.25
14x / 77x = 2/11
x = 1.5 because -7x + 3 = -15/2 -14x + 6 = -15 (x2) -14x + 21 = 0 (+15) 21 = 14x (+14x) 3 = 2x (/7) 1.5 = x