-19=8m-7+4m

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Solution for -19=8m-7+4m equation: 



-19=8m-7+4m

We move all terms to the left:

-19-(8m-7+4m)=0

We add all the numbers together, and all the variables

-(12m-7)-19=0

We get rid of parentheses

-12m+7-19=0

We add all the numbers together, and all the variables

-12m-12=0

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

-12m=12

m=12/-12

m=-1

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