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w in (-oo:+oo)
3-w = 4*w-22 // - 4*w-22
3-w-(4*w)+22 = 0
3-w-4*w+22 = 0
25-5*w = 0 // - 25
-5*w = -25 // : -5
w = -25/(-5)
w = 5
w = 5
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