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w in (-oo:+oo)
(-1/5)*w+1 = 52/55 // - 52/55
(-1/5)*w-(52/55)+1 = 0
(-1/5)*w-52/55+1 = 0
3/55-1/5*w = 0 // - 3/55
-1/5*w = -3/55 // : -1/5
w = -3/55/(-1/5)
w = 3/11
w = 3/11
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