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w in (-oo:+oo)
8-((1/3)*w) = 7*w+68/3 // - 7*w+68/3
8-((1/3)*w)-(7*w)-(68/3) = 0
(-1/3)*w-7*w-68/3+8 = 0
-22/3*w-44/3 = 0 // + 44/3
-22/3*w = 44/3 // : -22/3
w = 44/3/(-22/3)
w = -2
w = -2
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