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x/3+(2*x)/6 = 4/3 // - 4/3
x/3+(2*x)/6-(4/3) = 0
x/3+(2*x)/6-4/3 = 0
2/3*x-4/3 = 0 // + 4/3
2/3*x = 4/3 // : 2/3
x = 4/3/2/3
x = 2
x = 2
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