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3*(4*x-8) = (1/5)*(35*x+30) // - (1/5)*(35*x+30)
3*(4*x-8)-((1/5)*(35*x+30)) = 0
3*(4*x-8)+(-1/5)*(35*x+30) = 0
3*(4*x-8)-1/5*(35*x+30) = 0
3*(4*x-8)-1/5*(35*x+30) = 0
5*x-30 = 0
5*x-30 = 0
5*x-30 = 0 // + 30
5*x = 30 // : 5
x = 30/5
x = 6
x = 6
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