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w in (-oo:+oo)
(12/5)*w = 13/10 // - 13/10
(12/5)*w-(13/10) = 0
(12/5)*w-13/10 = 0
12/5*w-13/10 = 0 // + 13/10
12/5*w = 13/10 // : 12/5
w = 13/10/12/5
w = 13/24
w = 13/24
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