Help rearranging this algebra for Excel

I'm not quite sure how I'd rearrange this equation for use in Excel.

A=B(1+x)^-(C/365)

I need to solve for the value of x, and values A B and C are values from other cells on the excel workbook (E.G. H1=D7[1+x]^-[D3/365]) that a user would input and change.

I've tried re-arranging the equation itself to make x the subject but I'm not massively mathematically competent and I'd like to know if there's some way Excel could make this easier for me.

Thanks in advance.