3m+21=15-5m

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Solution for 3m+21=15-5m equation: 



3m+21=15-5m

We move all terms to the left:

3m+21-(15-5m)=0

We add all the numbers together, and all the variables

3m-(-5m+15)+21=0

We get rid of parentheses

3m+5m-15+21=0

We add all the numbers together, and all the variables

8m+6=0

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

8m=-6

m=-6/8

m=-3/4

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