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4*(x-(2/3)) = 2*x // - 2*x
4*(x-(2/3))-(2*x) = 0
4*(x-2/3)-2*x = 0
4*(x-2/3)-2*x = 0
2*x-8/3 = 0
2*x-8/3 = 0
2*x-8/3 = 0 // + 8/3
2*x = 8/3 // : 2
x = 8/3/2
x = 4/3
x = 4/3
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