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y in (-oo:+oo)
(-4/5)*(y-2) = (-1/9)*(y-2) // - (-1/9)*(y-2)
(-4/5)*(y-2)-((-1/9)*(y-2)) = 0
(-4/5)*(y-2)+(1/9)*(y-2) = 0
1/9*(y-2)-4/5*(y-2) = 0
1/9*(y-2)-4/5*(y-2) = 0
62/45-31/45*y = 0
62/45-31/45*y = 0
62/45-31/45*y = 0 // - 62/45
-31/45*y = -62/45 // : -31/45
y = -62/45/(-31/45)
y = 2
y = 2
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