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x in (-oo:+oo)
(1/4)*x+5 = (4/5)*x-3 // - (4/5)*x-3
(1/4)*x-((4/5)*x)+3+5 = 0
(1/4)*x+(-4/5)*x+3+5 = 0
8-11/20*x = 0 // - 8
-11/20*x = -8 // : -11/20
x = -8/(-11/20)
x = 160/11
x = 160/11
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