7(a-7)=2(13+a)

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Solution for 7(a-7)=2(13+a) equation: 



7(a-7)=2(13+a)

We move all terms to the left:

7(a-7)-(2(13+a))=0

We add all the numbers together, and all the variables

7(a-7)-(2(a+13))=0

We multiply parentheses

7a-(2(a+13))-49=0



We calculate terms in parentheses: -(2(a+13)), so:

2(a+13)

We multiply parentheses

2a+26

Back to the equation:

-(2a+26)



We get rid of parentheses

7a-2a-26-49=0

We add all the numbers together, and all the variables

5a-75=0

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

5a=75

a=75/5

a=15

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