820-6m=940-12m

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Solution for 820-6m=940-12m equation: 



820-6m=940-12m

We move all terms to the left:

820-6m-(940-12m)=0

We add all the numbers together, and all the variables

-6m-(-12m+940)+820=0

We get rid of parentheses

-6m+12m-940+820=0

We add all the numbers together, and all the variables

6m-120=0

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

6m=120

m=120/6

m=20

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