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