Can someone rearrange this to get F please?
And do it step by step
r=f/(n+f)

Hopes this helps please correct me if I am wrong:

f = rn/ 1-r

1. Multiply both sides by n + f.
r(n + f) = f

2. Expand.
rn + r f= f

3. Subtract r f from both sides.
rn = f - r f

4. Factor out the common factor f.
rn = f(1 - r)

5. Divided by sides by 1 - r.
rn/ 1 - r = f

6. Switch sides.
f = rn/ 1 - r

I’m confused ///: : : :

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;