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x in (-oo:+oo)
-3*x = (3/2)*x+3/2 // - (3/2)*x+3/2
-3*x-((3/2)*x)-(3/2) = 0
(-3/2)*x-3*x-3/2 = 0
-9/2*x-3/2 = 0 // + 3/2
-9/2*x = 3/2 // : -9/2
x = 3/2/(-9/2)
x = -1/3
x = -1/3
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