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y in (-oo:+oo)
8 = y/8-(8*(1/4)) // - y/8-(8*(1/4))
8*(1/4)-(y/8)+8 = 0
10-1/8*y = 0 // - 10
-1/8*y = -10 // : -1/8
y = -10/(-1/8)
y = 80
y = 80
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