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x in (-oo:+oo)
-2*x = -3/4 // + -3/4
-2*x-(-3/4) = 0
3/4-2*x = 0
3/4-2*x = 0 // - 3/4
-2*x = -3/4 // : -2
x = -3/4/(-2)
x = 3/8
x = 3/8
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