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x in (-oo:+oo)
(-5/2)*x-4 = -x-1 // + -x-1
(-5/2)*x+x-4+1 = 0
-3/2*x-3 = 0 // + 3
-3/2*x = 3 // : -3/2
x = 3/(-3/2)
x = -2
x = -2
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