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y in (-oo:+oo)
(-4/5)*y-(3/2) = -2/3 // + -2/3
(-4/5)*y-(3/2)-(-2/3) = 0
(-4/5)*y-3/2+2/3 = 0
-4/5*y-5/6 = 0 // + 5/6
-4/5*y = 5/6 // : -4/5
y = 5/6/(-4/5)
y = -25/24
y = -25/24
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