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(2*x-7)/5-7 = 6 // - 6
(2*x-7)/5-7-6 = 0
(2*x-7)/5+(-7*5)/5+(-6*5)/5 = 0
2*x-7*5-6*5-7 = 0
2*x-42-30 = 0
2*x-72 = 0
(2*x-72)/5 = 0
(2*x-72)/5 = 0 // * 5
2*x-72 = 0
2*x-72 = 0 // + 72
2*x = 72 // : 2
x = 72/2
x = 36
x = 36
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