How to find K from a*n(d) - b*N(d) = 0, d = ln(c/K) + b ?

[axiomlu]

How to find K value from the following equation (1)
　　
where n(d) and N(d) are normal density function and cumulative normal function. d is normal variable.
Thanks

 

[Deleted member 4993]

How to find K value from the following equation (1)
　　 View attachment 14168
where n(d) and N(d) are normal density function and cumulative normal function. d is normal variable.
Thanks

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[HallsofIvy]

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