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