Hi,

I'm having trouble transforming the following equation to predict ka (absorption rate constant):

tmax = ln(ka/k)/(ka-k)

So far I've tried (not sure if correct):

tmax = ln(ka) -ln(k)/(ka-k)

tmax(ka -k) -ln(ka) = -ln(k)

tmax.ka - tmax.k - ln(ka) = -ln(k)

tmax.ka - ln(ka) = -ln(k)+tmax.k

Thanks in advance