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y in (-oo:+oo)
12 = (3/8)*y // - (3/8)*y
12-((3/8)*y) = 0
(-3/8)*y+12 = 0
12-3/8*y = 0 // - 12
-3/8*y = -12 // : -3/8
y = -12/(-3/8)
y = 32
y = 32
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