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w in (-oo:+oo)
8-((3/2)*w)+12 = 8 // - 8
8-((3/2)*w)-8+12 = 0
(-3/2)*w-8+8+12 = 0
12-3/2*w = 0 // - 12
-3/2*w = -12 // : -3/2
w = -12/(-3/2)
w = 8
w = 8
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