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(2*(x+1))/3+7 = (8*x)/5 // - (8*x)/5
(2*(x+1))/3-((8*x)/5)+7 = 0
(2*(x+1))/3+(-8/5)*x+7 = 0
(2*(x+1))/3+(-8*x)/5+7 = 0
(2*5*(x+1))/(3*5)+(-8*3*x)/(3*5)+(3*5*7)/(3*5) = 0
2*5*(x+1)-8*3*x+3*5*7 = 0
10-14*x+105 = 0
115-14*x = 0
(115-14*x)/(3*5) = 0
(115-14*x)/(3*5) = 0 // * 3*5
115-14*x = 0
115-14*x = 0 // - 115
-14*x = -115 // : -14
x = -115/(-14)
x = 115/14
x = 115/14
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