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2*(x+3) = (3/4)*(8*x-12) // - (3/4)*(8*x-12)
2*(x+3)-((3/4)*(8*x-12)) = 0
2*(x+3)+(-3/4)*(8*x-12) = 0
2*(x+3)-3/4*(8*x-12) = 0
2*(x+3)-3/4*(8*x-12) = 0
15-4*x = 0
15-4*x = 0
15-4*x = 0 // - 15
-4*x = -15 // : -4
x = -15/(-4)
x = 15/4
x = 15/4
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