1-3(a+2)=7-a

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Solution for 1-3(a+2)=7-a equation: 



1-3(a+2)=7-a

We move all terms to the left:

1-3(a+2)-(7-a)=0

We add all the numbers together, and all the variables

-3(a+2)-(-1a+7)+1=0

We multiply parentheses

-3a-(-1a+7)-6+1=0

We get rid of parentheses

-3a+1a-7-6+1=0

We add all the numbers together, and all the variables

-2a-12=0

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

-2a=12

a=12/-2

a=-6

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