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27*(x+12/9) = 27*((1*x)/3) // - 27*((1*x)/3)
27*(x+12/9)-(27*((1*x)/3)) = 0
27*(x+12/9)-9*x = 0
27*(x+4/3)-9*x = 0
27*(x+4/3)-9*x = 0
18*x+36 = 0
18*x+36 = 0
18*x+36 = 0 // - 36
18*x = -36 // : 18
x = -36/18
x = -2
x = -2
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