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w in (-oo:+oo)
-(4*w)-1 = 11 // - 11
-(4*w)-11-1 = 0
-4*w-11-1 = 0
-4*w-12 = 0 // + 12
-4*w = 12 // : -4
w = 12/(-4)
w = -3
w = -3
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