a+9=3-a

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Solution for a+9=3-a equation: 



a+9=3-a

We move all terms to the left:

a+9-(3-a)=0

We add all the numbers together, and all the variables

a-(-1a+3)+9=0

We get rid of parentheses

a+1a-3+9=0

We add all the numbers together, and all the variables

2a+6=0

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

2a=-6

a=-6/2

a=-3

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