12b+9=12b+9

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Solution for 12b+9=12b+9 equation: 



12b+9=12b+9

We move all terms to the left:

12b+9-(12b+9)=0

We get rid of parentheses

12b-12b-9+9=0

We add all the numbers together, and all the variables

=0

b=0/1

b=0

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