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x in (-oo:+oo)
(1/8)*x-(1/8) = (2/5)*x-(3/8) // - (2/5)*x-(3/8)
(1/8)*x-((2/5)*x)-(1/8)+3/8 = 0
(1/8)*x+(-2/5)*x-1/8+3/8 = 0
1/4-11/40*x = 0 // - 1/4
-11/40*x = -1/4 // : -11/40
x = -1/4/(-11/40)
x = 10/11
x = 10/11
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