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-13+23=m-8
We move all terms to the left:
-13+23-(m-8)=0
We add all the numbers together, and all the variables
-(m-8)+10=0
We get rid of parentheses
-m+8+10=0
We add all the numbers together, and all the variables
-1m+18=0
We move all terms containing m to the left, all other terms to the right
-m=-18
m=-18/-1
m=+18
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