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w in (-oo:+oo)
3/7-(2*w) = -95/7 // + -95/7
3/7-(2*w)-(-95/7) = 0
3/7-2*w+95/7 = 0
14-2*w = 0 // - 14
-2*w = -14 // : -2
w = -14/(-2)
w = 7
w = 7
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