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3*((2/3)*x-(1/3)) = 5 // - 5
3*((2/3)*x-(1/3))-5 = 0
3*((2/3)*x-1/3)-5 = 0
3*(2/3*x-1/3)-5 = 0
3*(2/3*x-1/3)-5 = 0
2*x-6 = 0
2*x-6 = 0
2*x-6 = 0 // + 6
2*x = 6 // : 2
x = 6/2
x = 3
x = 3
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