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x in (-oo:+oo)
(8*x-31)/6 = x-5 // - x-5
(8*x-31)/6-x+5 = 0
(8*x-31)/6+(6*(-x))/6+(5*6)/6 = 0
8*x+6*(-x)+5*6-31 = 0
2*x-31+30 = 0
2*x-1 = 0
(2*x-1)/6 = 0
(2*x-1)/6 = 0 // * 6
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x = 1/2
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