-21=m/2

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Solution for -21=m/2 equation: 



-21=m/2

We move all terms to the left:

-21-(m/2)=0

We add all the numbers together, and all the variables

-(+m/2)-21=0

We get rid of parentheses

-m/2-21=0

We multiply all the terms by the denominator


-m-21*2=0

We add all the numbers together, and all the variables

-1m-42=0

We move all terms containing m to the left, all other terms to the right

-m=42

m=42/-1

m=-42

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