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y in (-oo:+oo)
(7/2)*y-(7/2) = -y-(1/3) // + -y-(1/3)
(7/2)*y+y-(7/2)+1/3 = 0
(7/2)*y+y-7/2+1/3 = 0
9/2*y-19/6 = 0 // + 19/6
9/2*y = 19/6 // : 9/2
y = 19/6/9/2
y = 19/27
y = 19/27
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