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