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3*x+6/7 = 27/7 // - 27/7
3*x+6/7-(27/7) = 0
3*x+6/7-27/7 = 0
3*x-3 = 0 // + 3
3*x = 3 // : 3
x = 3/3
x = 1
x = 1
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