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b in (-oo:+oo)
b/12 = 36/99.9 // - 36/99.9
b/12-(36/99.9) = 0
b/12-0.36036036 = 0
1/12*b-0.36036036 = 0 // + 0.36036036
1/12*b = 0.36036036 // : 1/12
b = 0.36036036/1/12
b = 4.32432449
b = 4.32432449
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