Can anyone solve this equation?

Change the subject of the equation to R.
1 over R = 1 over x + 1 over y

is your formula supposed to say:

1/R = 1/r +1/r?

In which case it would be:

1/R = 2/r

r = 2R

R = r/2

ah, you’ve edited

1/R = 1/x + 1/y
1/R = (x+y)/xy
R = xy/(x+y)

Has university challenge taught you nothing?!? It’s either zero or one.

What stoner said.

Or dd 🙂

42.
Well it is the answer to everything.

Stoner has the correct answer

1/R = 1/x + 1/y

R = 1/(1/x + 1/y)

xR3i = 3ix/(1/x + 1/y)

j

the answers j, it’s always j in ‘complicated’ mathematics……..

I agree with stoner, oh and it is the right answer to!

Looks like a baby robin to me…………