7(a+8)=9(a+9)

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Solution for 7(a+8)=9(a+9) equation: 



7(a+8)=9(a+9)

We move all terms to the left:

7(a+8)-(9(a+9))=0

We multiply parentheses

7a-(9(a+9))+56=0



We calculate terms in parentheses: -(9(a+9)), so:

9(a+9)

We multiply parentheses

9a+81

Back to the equation:

-(9a+81)



We get rid of parentheses

7a-9a-81+56=0

We add all the numbers together, and all the variables

-2a-25=0

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

-2a=25

a=25/-2

a=-12+1/2

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