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2*x-((2/3)*x)-4 = 4/5 // - 4/5
2*x-((2/3)*x)-(4/5)-4 = 0
2*x+(-2/3)*x-4/5-4 = 0
4/3*x-24/5 = 0 // + 24/5
4/3*x = 24/5 // : 4/3
x = 24/5/4/3
x = 18/5
x = 18/5
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