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(6*x+9)/5 = 7 // - 7
(6*x+9)/5-7 = 0
(6*x+9)/5+(-7*5)/5 = 0
6*x-7*5+9 = 0
6*x-26 = 0
(6*x-26)/5 = 0
(6*x-26)/5 = 0 // * 5
6*x-26 = 0
6*x-26 = 0 // + 26
6*x = 26 // : 6
x = 26/6
x = 13/3
x = 13/3
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