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y in (-oo:+oo)
3/7 = y/8 // - y/8
3/7-(y/8) = 0
3/7-1/8*y = 0 // - 3/7
-1/8*y = -3/7 // : -1/8
y = -3/7/(-1/8)
y = 24/7
y = 24/7
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