7(3a+12)-21a=80

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Solution for 7(3a+12)-21a=80 equation: 



7(3a+12)-21a=80

We move all terms to the left:

7(3a+12)-21a-(80)=0

We add all the numbers together, and all the variables

-21a+7(3a+12)-80=0

We multiply parentheses

-21a+21a+84-80=0

We add all the numbers together, and all the variables

4!=0

There is no solution for this equation

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