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x in (-oo:+oo)
x/8 = x/5+1/8 // - x/5+1/8
x/8-(x/5)-(1/8) = 0
x/8-(x/5)-1/8 = 0
-3/40*x-1/8 = 0 // + 1/8
-3/40*x = 1/8 // : -3/40
x = 1/8/(-3/40)
x = -5/3
x = -5/3
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