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w in (-oo:+oo)
3/2 = (2/7)*w-(4/3) // - (2/7)*w-(4/3)
3/2-((2/7)*w)+4/3 = 0
(-2/7)*w+3/2+4/3 = 0
17/6-2/7*w = 0 // - 17/6
-2/7*w = -17/6 // : -2/7
w = -17/6/(-2/7)
w = 119/12
w = 119/12
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