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b in (-oo:+oo)
b/2.3 = 9.66 // - 9.66
b/2.3-9.66 = 0
0.43478261*b-9.66 = 0 // + 9.66
0.43478261*b = 9.66 // : 0.43478261
b = 9.66/0.43478261
b = 22.21799993
b = 22.21799993
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