3m=7m+42

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Solution for 3m=7m+42 equation: 



3m=7m+42

We move all terms to the left:

3m-(7m+42)=0

We get rid of parentheses

3m-7m-42=0

We add all the numbers together, and all the variables

-4m-42=0

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

-4m=42

m=42/-4

m=-10+1/2

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