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5-(3*(4*x+5)) = 4*(1/2-(4*x)) // - 4*(1/2-(4*x))
5-(3*(4*x+5))-(4*(1/2-(4*x))) = 0
5-3*(4*x+5)-4*(1/2-4*x) = 0
5-3*(4*x+5)-4*(1/2-4*x) = 0
4*x-17+5 = 0
4*x-12 = 0
4*x-12 = 0
4*x-12 = 0 // + 12
4*x = 12 // : 4
x = 12/4
x = 3
x = 3
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