a+12=20-2a

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Solution for a+12=20-2a equation: 



a+12=20-2a

We move all terms to the left:

a+12-(20-2a)=0

We add all the numbers together, and all the variables

a-(-2a+20)+12=0

We get rid of parentheses

a+2a-20+12=0

We add all the numbers together, and all the variables

3a-8=0

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

3a=8

a=8/3

a=2+2/3

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