20=m+3m

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Solution for 20=m+3m equation: 



20=m+3m

We move all terms to the left:

20-(m+3m)=0

We add all the numbers together, and all the variables

-(+4m)+20=0

We get rid of parentheses

-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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