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w in (-oo:+oo)
1/3-((3/5)*w) = 77/15 // - 77/15
1/3-((3/5)*w)-(77/15) = 0
(-3/5)*w+1/3-77/15 = 0
-3/5*w-24/5 = 0 // + 24/5
-3/5*w = 24/5 // : -3/5
w = 24/5/(-3/5)
w = -8
w = -8
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