2m+6-5m=21

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Solution for 2m+6-5m=21 equation: 



2m+6-5m=21

We move all terms to the left:

2m+6-5m-(21)=0

We add all the numbers together, and all the variables

-3m-15=0

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

-3m=15

m=15/-3

m=-5

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