9a+(3a-4)=9a+3a-4

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Solution for 9a+(3a-4)=9a+3a-4 equation: 



9a+(3a-4)=9a+3a-4

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

9a+3a-12a-4+4=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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