7a-21=a+6(4+a)

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Solution for 7a-21=a+6(4+a) equation: 



7a-21=a+6(4+a)

We move all terms to the left:

7a-21-(a+6(4+a))=0

We add all the numbers together, and all the variables

7a-(a+6(a+4))-21=0



We calculate terms in parentheses: -(a+6(a+4)), so:

a+6(a+4)

We multiply parentheses

a+6a+24

We add all the numbers together, and all the variables

7a+24

Back to the equation:

-(7a+24)



We get rid of parentheses

7a-7a-24-21=0

We add all the numbers together, and all the variables

-45!=0

There is no solution for this equation

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