12a+21=3a-32

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Solution for 12a+21=3a-32 equation: 



12a+21=3a-32

We move all terms to the left:

12a+21-(3a-32)=0

We get rid of parentheses

12a-3a+32+21=0

We add all the numbers together, and all the variables

9a+53=0

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

9a=-53

a=-53/9

a=-5+8/9

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