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21=m+141/2
We move all terms to the left:
21-(m+141/2)=0
We add all the numbers together, and all the variables
-(+m+141/2)+21=0
We get rid of parentheses
-m+21-141/2=0
We multiply all the terms by the denominator
-m*2-141+21*2=0
We add all the numbers together, and all the variables
-m*2-99=0
Wy multiply elements
-2m-99=0
We move all terms containing m to the left, all other terms to the right
-2m=99
m=99/-2
m=-49+1/2
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