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(7*(2*x-2))/14 = 10 // - 10
(7*(2*x-2))/14-10 = 0
(7*(2*x-2))/14+(-10*14)/14 = 0
7*(2*x-2)-10*14 = 0
14*x-154 = 0
(14*x-154)/14 = 0
(14*x-154)/14 = 0 // * 14
14*x-154 = 0
14*x-154 = 0 // + 154
14*x = 154 // : 14
x = 154/14
x = 11
x = 11
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