3m+7=-2m-8

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Solution for 3m+7=-2m-8 equation: 



3m+7=-2m-8

We move all terms to the left:

3m+7-(-2m-8)=0

We get rid of parentheses

3m+2m+8+7=0

We add all the numbers together, and all the variables

5m+15=0

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

5m=-15

m=-15/5

m=-3

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