7a/21-21=0

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Solution for 7a/21-21=0 equation: 



7a/21-21=0

We multiply all the terms by the denominator


7a-21*21=0

We add all the numbers together, and all the variables

7a-441=0

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

7a=441

a=441/7

a=63

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