Note that 1/(a/b) = b/a (ie the reciprocal of a/b is b/a) use that on the RHS to get R1R2/(R1+R2)
Solve R = 1 / (1/R1+1/R2) For R1
Can someone please describe in detail how this is done.
I first added the bottom fractions and next I figure that the right hand side has to be inverted but I'm not sure how that should be done.
Any help is appreciated.