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W in (-oo:+oo)
W/4+1.2 = -5.2 // + 5.2
W/4+1.2+5.2 = 0
1/4*W+6.4 = 0 // - 6.4
1/4*W = -6.4 // : 1/4
W = -6.4/1/4
W = -25.6
W = -25.6
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