11m+9m=-20

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Solution for 11m+9m=-20 equation: 



11m+9m=-20

We move all terms to the left:

11m+9m-(-20)=0

We add all the numbers together, and all the variables

20m+20=0

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

20m=-20

m=-20/20

m=-1

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