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y in (-oo:+oo)
(-3/4)*y = 1/8 // - 1/8
(-3/4)*y-(1/8) = 0
(-3/4)*y-1/8 = 0
-3/4*y-1/8 = 0 // + 1/8
-3/4*y = 1/8 // : -3/4
y = 1/8/(-3/4)
y = -1/6
y = -1/6
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