-7+8a=9(1-a)

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Solution for -7+8a=9(1-a) equation: 



-7+8a=9(1-a)

We move all terms to the left:

-7+8a-(9(1-a))=0

We add all the numbers together, and all the variables

8a-(9(-1a+1))-7=0



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

9(-1a+1)

We multiply parentheses

-9a+9

Back to the equation:

-(-9a+9)



We get rid of parentheses

8a+9a-9-7=0

We add all the numbers together, and all the variables

17a-16=0

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

17a=16

a=16/17

a=16/17

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