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w in (-oo:+oo)
w/2.3+9.8 = 0
0.43478261*w+9.8 = 0 // - 9.8
0.43478261*w = -9.8 // : 0.43478261
w = -9.8/0.43478261
w = -22.53999993
w = -22.53999993
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