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5m-9=-9+5m
We move all terms to the left:
5m-9-(-9+5m)=0
We add all the numbers together, and all the variables
5m-(5m-9)-9=0
We get rid of parentheses
5m-5m+9-9=0
We add all the numbers together, and all the variables
=0
m=0/1
m=0
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