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x in (-oo:+oo)
(6/5)*y-(77/5) = x // - x
(6/5)*y-x-(77/5) = 0
(6/5)*y-x-77/5 = 0
6/5*y-x-77/5 = 0 // - 6/5*y-77/5
-x = -(6/5*y-77/5) // * -1
x = 6/5*y-77/5
x = 6/5*y-77/5
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