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