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b in (-oo:+oo)
b/9.3 = 8 // - 8
b/9.3-8 = 0
0.10752688*b-8 = 0 // + 8
0.10752688*b = 8 // : 0.10752688
b = 8/0.10752688
b = 74.40000119
b = 74.40000119
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