7m+9=8m+31

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Solution for 7m+9=8m+31 equation: 



7m+9=8m+31

We move all terms to the left:

7m+9-(8m+31)=0

We get rid of parentheses

7m-8m-31+9=0

We add all the numbers together, and all the variables

-1m-22=0

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

-m=22

m=22/-1

m=-22

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