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

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



-9(a-1)=-3(-3a-9)
We move all terms to the left:
-9(a-1)-(-3(-3a-9))=0
We multiply parentheses
-9a-(-3(-3a-9))+9=0
We calculate terms in parentheses: -(-3(-3a-9)), so:
-3(-3a-9)
We multiply parentheses
9a+27
Back to the equation:
-(9a+27)
We get rid of parentheses
-9a-9a-27+9=0
We add all the numbers together, and all the variables
-18a-18=0
We move all terms containing a to the left, all other terms to the right
-18a=18
a=18/-18
a=-1

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