8m+9=21

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Solution for 8m+9=21 equation: 



8m+9=21

We move all terms to the left:

8m+9-(21)=0

We add all the numbers together, and all the variables

8m-12=0

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

8m=12

m=12/8

m=1+1/2

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