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w in (-oo:+oo)
-9/2 = (-3/2)*w+3/5 // - (-3/2)*w+3/5
-((-3/2)*w)-9/2-(3/5) = 0
(3/2)*w-9/2-3/5 = 0
3/2*w-51/10 = 0 // + 51/10
3/2*w = 51/10 // : 3/2
w = 51/10/3/2
w = 17/5
w = 17/5
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