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August 3, 2015

Homework Help: algebra

Posted by Lisa on Sunday, April 19, 2009 at 12:20am.

Here is the problem I am working on and what I did so far:
4+m-3m
First I did this:
4+(m-3m)
Then I did this:
4+(-2m)
I thought my answer should be:
4-2m
The answer key says the answer should be:
-2m+4
What did I do wrong?

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