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