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2*x+7 = (1/3)*x+61/8 // - (1/3)*x+61/8
2*x-((1/3)*x)-(61/8)+7 = 0
2*x+(-1/3)*x-61/8+7 = 0
5/3*x-5/8 = 0 // + 5/8
5/3*x = 5/8 // : 5/3
x = 5/8/5/3
x = 3/8
x = 3/8
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