20+-6a=6+-6a+7

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Solution for 20+-6a=6+-6a+7 equation: 



20+-6a=6+-6a+7

We move all terms to the left:

20+-6a-(6+-6a+7)=0

We add all the numbers together, and all the variables

-6a-(-6a)+20+=0

We add all the numbers together, and all the variables

-6a-(-6a)=0

We get rid of parentheses

-6a+6a=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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