Hi, maths is a long time ago for me and I need to solve this equation (if its possible). I've read where to post but its been so long I'm still not sure so if this isnt the right area then I apologise.

I have a formula where,

x = a - b + (((a+b)/2) * e) * f

is it possible to rearrange this formula so I could isolate b i.e. b = ?

Any help would be greatly appreciated

Many thanks

Steve