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(1/5)*(x-1)+(1/7)*(x+2) = (1/35)*(x+8) // - (1/35)*(x+8)
(1/5)*(x-1)+(1/7)*(x+2)-((1/35)*(x+8)) = 0
(1/5)*(x-1)+(1/7)*(x+2)+(-1/35)*(x+8) = 0
1/5*(x-1)+1/7*(x+2)-1/35*(x+8) = 0
1/5*(x-1)+1/7*(x+2)-1/35*(x+8) = 0
12/35*x-1/35*x-8/35+3/35 = 0
11/35*x-1/7 = 0
11/35*x-1/7 = 0
11/35*x-1/7 = 0 // + 1/7
11/35*x = 1/7 // : 11/35
x = 1/7/11/35
x = 5/11
x = 5/11
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