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