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w in (-oo:+oo)
46/3 = w+7*w+10 // - w+7*w+10
46/3-w-(7*w)-10 = 0
46/3-w-7*w-10 = 0
16/3-8*w = 0 // - 16/3
-8*w = -16/3 // : -8
w = -16/3/(-8)
w = 2/3
w = 2/3
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