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(4*(x+2))/5 = (5*x)/13+7 // - (5*x)/13+7
(4*(x+2))/5-((5*x)/13)-7 = 0
(4*(x+2))/5+(-5/13)*x-7 = 0
(4*(x+2))/5+(-5*x)/13-7 = 0
(4*13*(x+2))/(5*13)+(-5*5*x)/(5*13)+(-7*5*13)/(5*13) = 0
4*13*(x+2)-5*5*x-7*5*13 = 0
27*x-455+104 = 0
27*x-351 = 0
(27*x-351)/(5*13) = 0
(27*x-351)/(5*13) = 0 // * 5*13
27*x-351 = 0
27*x-351 = 0 // + 351
27*x = 351 // : 27
x = 351/27
x = 13
x = 13
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