10m+(-2m)-(-m)=(-9)

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Solution for 10m+(-2m)-(-m)=(-9) equation: 



10m+(-2m)-(-m)=(-9)

We move all terms to the left:

10m+(-2m)-(-m)-((-9))=0

We add all the numbers together, and all the variables

10m+(-2m)-(-1m)-((-9))=0

We add all the numbers together, and all the variables

10m+(-2m)-(-1m)+9=0

We get rid of parentheses

10m-2m+1m+9=0

We add all the numbers together, and all the variables

9m+9=0

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

9m=-9

m=-9/9

m=-1

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