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3*x-((1/5)*x)-4 = 2/3 // - 2/3
3*x-((1/5)*x)-(2/3)-4 = 0
3*x+(-1/5)*x-2/3-4 = 0
14/5*x-14/3 = 0 // + 14/3
14/5*x = 14/3 // : 14/5
x = 14/3/14/5
x = 5/3
x = 5/3
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