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w in (-oo:+oo)
w/4+4 = -1.12 // + 1.12
w/4+1.12+4 = 0
1/4*w+5.12 = 0 // - 5.12
1/4*w = -5.12 // : 1/4
w = -5.12/1/4
w = -20.48
w = -20.48
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