7m-9m=4

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Solution for 7m-9m=4 equation: 



7m-9m=4

We move all terms to the left:

7m-9m-(4)=0

We add all the numbers together, and all the variables

-2m-4=0

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

-2m=4

m=4/-2

m=-2

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