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b in (-oo:+oo)
b/8 = 9/24 // - 9/24
b/8-(9/24) = 0
b/8-3/8 = 0
1/8*b-3/8 = 0 // + 3/8
1/8*b = 3/8 // : 1/8
b = 3/8/1/8
b = 3
b = 3
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