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