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w in (-oo:+oo)
8-4*w = 7*w+74 // - 7*w+74
8-4*w-(7*w)-74 = 0
8-4*w-7*w-74 = 0
-11*w-66 = 0 // + 66
-11*w = 66 // : -11
w = 66/(-11)
w = -6
w = -6
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