9(1-a)=1-7a

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



9(1-a)=1-7a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

-9a+7a-1+9=0

We add all the numbers together, and all the variables

-2a+8=0

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

-2a=-8

a=-8/-2

a=+4

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