9=6(7-3a)-3(1-a)

Solution for 9=6(7-3a)-3(1-a) equation:

9=6(7-3a)-3(1-a)

We move all terms to the left:

9-(6(7-3a)-3(1-a))=0

We add all the numbers together, and all the variables

-(6(-3a+7)-3(-1a+1))+9=0


We calculate terms in parentheses: -(6(-3a+7)-3(-1a+1)), so:

6(-3a+7)-3(-1a+1)

We multiply parentheses

-18a+3a+42-3

We add all the numbers together, and all the variables

-15a+39

Back to the equation:

-(-15a+39)


We get rid of parentheses

15a-39+9=0

We add all the numbers together, and all the variables

15a-30=0

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

15a=30

a=30/15

a=2