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w in (-oo:+oo)
1/5-((1/2)*w) = -29/5 // + -29/5
1/5-((1/2)*w)-(-29/5) = 0
(-1/2)*w+1/5+29/5 = 0
6-1/2*w = 0 // - 6
-1/2*w = -6 // : -1/2
w = -6/(-1/2)
w = 12
w = 12
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