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x in (-oo:+oo)
5 = 3*x-(5/2) // - 3*x-(5/2)
5/2-(3*x)+5 = 0
5/2-3*x+5 = 0
15/2-3*x = 0 // - 15/2
-3*x = -15/2 // : -3
x = -15/2/(-3)
x = 5/2
x = 5/2
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