Hi, I hope you can help, it's a long time since school and I find my self with a practical problem where I need to isolate a variable in a formula. The formula is

S = ((DH/(H-D+F))-((DH/(H+D-F))

Is it possible to derive a formula or solve for D i.e isolate D given I have the values of all the other variables?

Many thanks for your help, this will help me a great deal

Steve