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7-9(8-m)-13=5
We move all terms to the left:
7-9(8-m)-13-(5)=0
We add all the numbers together, and all the variables
-9(-1m+8)+7-13-5=0
We add all the numbers together, and all the variables
-9(-1m+8)-11=0
We multiply parentheses
9m-72-11=0
We add all the numbers together, and all the variables
9m-83=0
We move all terms containing m to the left, all other terms to the right
9m=83
m=83/9
m=9+2/9
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