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