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x in (-oo:+oo)
3*x-(5/2) = x-10 // - x-10
3*x-x-(5/2)+10 = 0
3*x-x-5/2+10 = 0
2*x+15/2 = 0 // - 15/2
2*x = -15/2 // : 2
x = -15/2/2
x = -15/4
x = -15/4
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