-9m-13m=20

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Solution for -9m-13m=20 equation: 



-9m-13m=20

We move all terms to the left:

-9m-13m-(20)=0

We add all the numbers together, and all the variables

-22m-20=0

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

-22m=20

m=20/-22

m=-10/11

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