9a+2a-12=3a+4

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Solution for 9a+2a-12=3a+4 equation: 



9a+2a-12=3a+4

We move all terms to the left:

9a+2a-12-(3a+4)=0

We add all the numbers together, and all the variables

11a-(3a+4)-12=0

We get rid of parentheses

11a-3a-4-12=0

We add all the numbers together, and all the variables

8a-16=0

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

8a=16

a=16/8

a=2

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