SOLUTION: When adding two rational expressions with a variable in the denominator do I double the variable Like 13/33r + 11/9r I added the numerators and the denominators and came up with

Question 557408: When adding two rational expressions with a variable in the denominator do I double the variable Like 13/33r + 11/9r I added the numerators and the denominators and came up with 24/42r which simplifies down to 4/7r Now do I make the variable r, r^2 so that the answer is 4/7r^2 Also let me know if I did this problem right? Thanks
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!

just like in ordinary fractions, you have to have a common denominator to add (or subtract) fractions.
In this problem the common denominator will be 99r
:
= =
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