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w in (-oo:+oo)
(2*w)/5+2 = 11 // - 11
(2*w)/5-11+2 = 0
2/5*w-9 = 0 // + 9
2/5*w = 9 // : 2/5
w = 9/2/5
w = 45/2
w = 45/2
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