42=78m+13m

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Solution for 42=78m+13m equation: 



42=78m+13m

We move all terms to the left:

42-(78m+13m)=0

We add all the numbers together, and all the variables

-(+91m)+42=0

We get rid of parentheses

-91m+42=0

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

-91m=-42

m=-42/-91

m=6/13

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