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w in (-oo:+oo)
w+5*w-1/2 = -133/2 // + -133/2
w+5*w-1/2-(-133/2) = 0
w+5*w-1/2+133/2 = 0
6*w+66 = 0 // - 66
6*w = -66 // : 6
w = -66/6
w = -11
w = -11
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