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3*((1/3)*x+2)+5*x = 42 // - 42
3*((1/3)*x+2)+5*x-42 = 0
3*(1/3*x+2)+5*x-42 = 0
3*(1/3*x+2)+5*x-42 = 0
6*x-42+6 = 0
6*x-36 = 0
6*x-36 = 0
6*x-36 = 0 // + 36
6*x = 36 // : 6
x = 36/6
x = 6
x = 6
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