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y in (-oo:+oo)
(4/5)*y-8 = (2/5)*y+16 // - (2/5)*y+16
(4/5)*y-((2/5)*y)-16-8 = 0
(4/5)*y+(-2/5)*y-16-8 = 0
2/5*y-24 = 0 // + 24
2/5*y = 24 // : 2/5
y = 24/2/5
y = 60
y = 60
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