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y in (-oo:+oo)
1/3-((5/2)*y) = 3/4 // - 3/4
1/3-((5/2)*y)-(3/4) = 0
(-5/2)*y+1/3-3/4 = 0
-5/2*y-5/12 = 0 // + 5/12
-5/2*y = 5/12 // : -5/2
y = 5/12/(-5/2)
y = -1/6
y = -1/6
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