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y in (-oo:+oo)
y/5-((y-3)/8) = 2*y // - 2*y
y/5-((y-3)/8)-(2*y) = 0
y/5-((y-3)/8)-2*y = 0
(-1*(y-3))/8+y/5-2*y = 0
(-1*5*(y-3))/(5*8)+(8*y)/(5*8)+(-2*5*8*y)/(5*8) = 0
8*y-1*5*(y-3)-2*5*8*y = 0
3*y-80*y+15 = 0
15-77*y = 0
(15-77*y)/(5*8) = 0
(15-77*y)/(5*8) = 0 // * 5*8
15-77*y = 0
15-77*y = 0 // - 15
-77*y = -15 // : -77
y = -15/(-77)
y = 15/77
y = 15/77
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