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x in (-oo:+oo)
-(4*x)-9 = -1 // + 1
1-(4*x)-9 = 0
1-4*x-9 = 0
-4*x-8 = 0 // + 8
-4*x = 8 // : -4
x = 8/(-4)
x = -2
x = -2
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