8a-21=7(8a-3)

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Solution for 8a-21=7(8a-3) equation: 



8a-21=7(8a-3)

We move all terms to the left:

8a-21-(7(8a-3))=0



We calculate terms in parentheses: -(7(8a-3)), so:

7(8a-3)

We multiply parentheses

56a-21

Back to the equation:

-(56a-21)



We get rid of parentheses

8a-56a+21-21=0

We add all the numbers together, and all the variables

-48a=0

a=0/-48

a=0

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