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y in (-oo:+oo)
y/3-y-(8/5) = 12/5 // - 12/5
y/3-y-(8/5)-(12/5) = 0
y/3-y-8/5-12/5 = 0
-2/3*y-4 = 0 // + 4
-2/3*y = 4 // : -2/3
y = 4/(-2/3)
y = -6
y = -6
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