7a/21=28

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Solution for 7a/21=28 equation: 



7a/21=28

We move all terms to the left:

7a/21-(28)=0

We multiply all the terms by the denominator


7a-28*21=0

We add all the numbers together, and all the variables

7a-588=0

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

7a=588

a=588/7

a=84

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