9m+21=75

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Solution for 9m+21=75 equation: 



9m+21=75

We move all terms to the left:

9m+21-(75)=0

We add all the numbers together, and all the variables

9m-54=0

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

9m=54

m=54/9

m=6

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