-8m-13m=-42

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Solution for -8m-13m=-42 equation: 



-8m-13m=-42

We move all terms to the left:

-8m-13m-(-42)=0

We add all the numbers together, and all the variables

-21m+42=0

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

-21m=-42

m=-42/-21

m=+2

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