21-2m=23

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Solution for 21-2m=23 equation: 



21-2m=23

We move all terms to the left:

21-2m-(23)=0

We add all the numbers together, and all the variables

-2m-2=0

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

-2m=2

m=2/-2

m=-1

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