6=-a+30+12-2a

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Solution for 6=-a+30+12-2a equation: 



6=-a+30+12-2a

We move all terms to the left:

6-(-a+30+12-2a)=0

We add all the numbers together, and all the variables

-(-3a+42)+6=0

We get rid of parentheses

3a-42+6=0

We add all the numbers together, and all the variables

3a-36=0

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

3a=36

a=36/3

a=12

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