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w in (-oo:+oo)
-((1/5)*w)-7/4 = -7/3 // + -7/3
-((1/5)*w)-7/4-(-7/3) = 0
(-1/5)*w-7/4+7/3 = 0
7/12-1/5*w = 0 // - 7/12
-1/5*w = -7/12 // : -1/5
w = -7/12/(-1/5)
w = 35/12
w = 35/12
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