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(1/3)*x-13 = 23-((1/3)*x) // - 23-((1/3)*x)
(1/3)*x+(1/3)*x-23-13 = 0
2/3*x-36 = 0 // + 36
2/3*x = 36 // : 2/3
x = 36/2/3
x = 54
x = 54
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