20=12+2m

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Solution for 20=12+2m equation: 



20=12+2m

We move all terms to the left:

20-(12+2m)=0

We add all the numbers together, and all the variables

-(2m+12)+20=0

We get rid of parentheses

-2m-12+20=0

We add all the numbers together, and all the variables

-2m+8=0

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

-2m=-8

m=-8/-2

m=+4

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