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w in (-oo:+oo)
w+1 = 6*w+26 // - 6*w+26
w-(6*w)-26+1 = 0
w-6*w-26+1 = 0
-5*w-25 = 0 // + 25
-5*w = 25 // : -5
w = 25/(-5)
w = -5
w = -5
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