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(2+m)+1=13
We move all terms to the left:
(2+m)+1-(13)=0
We add all the numbers together, and all the variables
(m+2)+1-13=0
We add all the numbers together, and all the variables
(m+2)-12=0
We get rid of parentheses
m+2-12=0
We add all the numbers together, and all the variables
m-10=0
We move all terms containing m to the left, all other terms to the right
m=10
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