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x in (-oo:+oo)
(5/2)*x-5 = 3*x+7 // - 3*x+7
(5/2)*x-(3*x)-7-5 = 0
(5/2)*x-3*x-7-5 = 0
-1/2*x-12 = 0 // + 12
-1/2*x = 12 // : -1/2
x = 12/(-1/2)
x = -24
x = -24
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