13=-2m-5

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Solution for 13=-2m-5 equation: 



13=-2m-5

We move all terms to the left:

13-(-2m-5)=0

We get rid of parentheses

2m+5+13=0

We add all the numbers together, and all the variables

2m+18=0

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

2m=-18

m=-18/2

m=-9

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