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