8a=9(a-1)

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Solution for 8a=9(a-1) equation: 



8a=9(a-1)

We move all terms to the left:

8a-(9(a-1))=0



We calculate terms in parentheses: -(9(a-1)), so:

9(a-1)

We multiply parentheses

9a-9

Back to the equation:

-(9a-9)



We get rid of parentheses

8a-9a+9=0

We add all the numbers together, and all the variables

-1a+9=0

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

-a=-9

a=-9/-1

a=+9

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