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