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3*x-((1/3)*x)-1 = 4 // - 4
3*x-((1/3)*x)-4-1 = 0
3*x+(-1/3)*x-4-1 = 0
8/3*x-5 = 0 // + 5
8/3*x = 5 // : 8/3
x = 5/8/3
x = 15/8
x = 15/8
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