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3 = (1/2)*(3*x-6) // - (1/2)*(3*x-6)
3-((1/2)*(3*x-6)) = 0
(-1/2)*(3*x-6)+3 = 0
3-1/2*(3*x-6) = 0
3-1/2*(3*x-6) = 0
6-3/2*x = 0
6-3/2*x = 0
6-3/2*x = 0 // - 6
-3/2*x = -6 // : -3/2
x = -6/(-3/2)
x = 4
x = 4
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