9=3-2a

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Solution for 9=3-2a equation: 



9=3-2a

We move all terms to the left:

9-(3-2a)=0

We add all the numbers together, and all the variables

-(-2a+3)+9=0

We get rid of parentheses

2a-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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