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w in (-oo:+oo)
(3/8)*w-(1/2) = (5/4)*w+1/6 // - (5/4)*w+1/6
(3/8)*w-((5/4)*w)-(1/2)-(1/6) = 0
(3/8)*w+(-5/4)*w-1/2-1/6 = 0
-7/8*w-2/3 = 0 // + 2/3
-7/8*w = 2/3 // : -7/8
w = 2/3/(-7/8)
w = -16/21
w = -16/21
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