3a+7-3+6a=-3a-7+2a-9

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Solution for 3a+7-3+6a=-3a-7+2a-9 equation: 



3a+7-3+6a=-3a-7+2a-9

We move all terms to the left:

3a+7-3+6a-(-3a-7+2a-9)=0

We add all the numbers together, and all the variables

3a+6a-(-1a-16)+7-3=0

We add all the numbers together, and all the variables

9a-(-1a-16)+4=0

We get rid of parentheses

9a+1a+16+4=0

We add all the numbers together, and all the variables

10a+20=0

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

10a=-20

a=-20/10

a=-2

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