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w in (-oo:+oo)
-((2/5)*w)-3/2 = -2/5 // + -2/5
-((2/5)*w)-3/2-(-2/5) = 0
(-2/5)*w-3/2+2/5 = 0
-2/5*w-11/10 = 0 // + 11/10
-2/5*w = 11/10 // : -2/5
w = 11/10/(-2/5)
w = -11/4
w = -11/4
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