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w in (-oo:+oo)
2/5 = w/65 // - w/65
2/5-(w/65) = 0
2/5-1/65*w = 0 // - 2/5
-1/65*w = -2/5 // : -1/65
w = -2/5/(-1/65)
w = 26
w = 26
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