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x in (-oo:+oo)
6/8 = (3/2)*x // - (3/2)*x
6/8-((3/2)*x) = 0
(-3/2)*x+6/8 = 0
3/4-3/2*x = 0 // - 3/4
-3/2*x = -3/4 // : -3/2
x = -3/4/(-3/2)
x = 1/2
x = 1/2
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