You can put this solution on YOUR website! ----------------------------------------
If p = q (r - 1/s), find r.
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You want r.
Undo everything that was done to r.
--------or use simple fraction skills to put into single rational expression if you want.
You DON'T distribute the q, as someone suggested. That's unnecessary.
Just DIVIDE each side by q. You'll then get r on the right side.
Then ISOLATE r by ADDING to both sides, and that's it! The equation will be solved for r.