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y in (-oo:+oo)
3*y-(11/7) = 5*y-(12/14) // - 5*y-(12/14)
3*y-(5*y)-(11/7)+12/14 = 0
3*y-5*y-11/7+12/14 = 0
-2*y-5/7 = 0 // + 5/7
-2*y = 5/7 // : -2
y = 5/7/(-2)
y = -5/14
y = -5/14
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