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(4*x)/9+7*x+2*x-13-2 = 180 // - 180
(4*x)/9+7*x+2*x-180-13-2 = 0
85/9*x-195 = 0 // + 195
85/9*x = 195 // : 85/9
x = 195/85/9
x = 351/17
x = 351/17
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