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