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3*(x-(30/5)) = 30 // - 30
3*(x-(30/5))-30 = 0
3*(x-6)-30 = 0
3*(x-6)-30 = 0
3*x-48 = 0
3*x-48 = 0
3*x-48 = 0 // + 48
3*x = 48 // : 3
x = 48/3
x = 16
x = 16
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