-7=8-3m

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Solution for -7=8-3m equation: 



-7=8-3m

We move all terms to the left:

-7-(8-3m)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

3m-8-7=0

We add all the numbers together, and all the variables

3m-15=0

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

3m=15

m=15/3

m=5

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