dj, don't be a jerk. ftoor is having some problems with algebra, and I'm sure he doesn't need your snarky comments...
"if (1+ 1/r)x=1, then what does x equal in terms of r"
Simply divide both sides of the equation by (1+ 1/r), isolating X.
then, on the other side of the equation, you get 1/(1+ 1/r)
So you've solved for x. Now you need to simplfy.
Since you have a fraction, you can multiply the top by whatever you'd like, as long as you multiply the bottom. The thorny part of this expression is the 1/r part, so lets multiply the top and bottom of the fraction by r.
Top of the fraction is 1. 1*r=r
Bottom of the fraction is (1+ 1/r). Multiply both terms by r, and you get r+(r/r), which reduces to r+1
Send me a private message if this doesn't make sense.
hard words were never intended. ftoor, excuse me if I acted snobbishly.
did that showed my schizophrenic aspect