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