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x in (-oo:+oo)
(x+11)/7 = (2*x+1)/(-8) // - (2*x+1)/(-8)
(x+11)/7-((2*x+1)/(-8)) = 0
(x+11)/7+(-1*(2*x+1))/(-8) = 0
(-8*(x+11))/(-8*7)+(-1*7*(2*x+1))/(-8*7) = 0
-8*(x+11)-1*7*(2*x+1) = 0
-22*x-95 = 0
(-22*x-95)/(-8*7) = 0
(-22*x-95)/(-8*7) = 0 // * -8*7
-22*x-95 = 0
-22*x-95 = 0 // + 95
-22*x = 95 // : -22
x = 95/(-22)
x = -95/22
x = -95/22
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