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y in (-oo:+oo)
5/2-5*y = (-5/4)*y-(4/3) // - (-5/4)*y-(4/3)
5/2-5*y-((-5/4)*y)+4/3 = 0
(5/4)*y-5*y+5/2+4/3 = 0
23/6-15/4*y = 0 // - 23/6
-15/4*y = -23/6 // : -15/4
y = -23/6/(-15/4)
y = 46/45
y = 46/45
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