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y in (-oo:+oo)
-y/12-(5/2) = 0
-y/12-5/2 = 0
-1/12*y-5/2 = 0 // + 5/2
-1/12*y = 5/2 // : -1/12
y = 5/2/(-1/12)
y = -30
y = -30
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