3m+5=7m-15

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Solution for 3m+5=7m-15 equation: 



3m+5=7m-15

We move all terms to the left:

3m+5-(7m-15)=0

We get rid of parentheses

3m-7m+15+5=0

We add all the numbers together, and all the variables

-4m+20=0

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

-4m=-20

m=-20/-4

m=+5

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