SOLUTION: Can someone show me how to write the rational expression in lowest terms? r-13/13-r

Question 76828: Can someone show me how to write the rational expression in lowest terms?
r-13/13-r
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
My interpretation of your problem is that you need to simplify the rational
expression:
.

.
That being the case, notice what happens if you change the denominator by factoring
out -1. If you do that factoring you get:
.

.
and re-arranging the terms inside the parentheses in the denominator results in:
.

.
Now you can cancel the like terms of the denominator and numerator to get:
.

.
and this leaves you with just:
.

.
So the result of this simplification is just plain
.
Hope this helps you to see your way through the problem.
.

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