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(3/5)*(x+2)+(4/5)*(x+4) = 17 // - 17
(3/5)*(x+2)+(4/5)*(x+4)-17 = 0
3/5*(x+2)+4/5*(x+4)-17 = 0
3/5*(x+2)+4/5*(x+4)-17 = 0
7/5*x-17+22/5 = 0
7/5*x-63/5 = 0
7/5*x-63/5 = 0
7/5*x-63/5 = 0 // + 63/5
7/5*x = 63/5 // : 7/5
x = 63/5/7/5
x = 9
x = 9
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