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12 = (1/2)*(3*x-8) // - (1/2)*(3*x-8)
12-((1/2)*(3*x-8)) = 0
(-1/2)*(3*x-8)+12 = 0
12-1/2*(3*x-8) = 0
12-1/2*(3*x-8) = 0
16-3/2*x = 0
16-3/2*x = 0
16-3/2*x = 0 // - 16
-3/2*x = -16 // : -3/2
x = -16/(-3/2)
x = 32/3
x = 32/3
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