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(x+1)/10 = (x-7)/8+2/5 // - (x-7)/8+2/5
(x+1)/10-((x-7)/8)-(2/5) = 0
(x+1)/10-((x-7)/8)-2/5 = 0
(x+1)/10+(-1*(x-7))/8-2/5 = 0
(5*8*(x+1))/(5*8*10)+(-1*5*10*(x-7))/(5*8*10)+(-2*8*10)/(5*8*10) = 0
5*8*(x+1)-1*5*10*(x-7)-2*8*10 = 0
390-10*x-160 = 0
230-10*x = 0
(230-10*x)/(5*8*10) = 0
(230-10*x)/(5*8*10) = 0 // * 5*8*10
230-10*x = 0
230-10*x = 0 // - 230
-10*x = -230 // : -10
x = -230/(-10)
x = 23
x = 23
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