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3*x-(1/8) = (4*x)/3 // - (4*x)/3
3*x-((4*x)/3)-(1/8) = 0
3*x+(-4/3)*x-1/8 = 0
5/3*x-1/8 = 0 // + 1/8
5/3*x = 1/8 // : 5/3
x = 1/8/5/3
x = 3/40
x = 3/40
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