-6a-3(a-12)=6(a-9)

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Solution for -6a-3(a-12)=6(a-9) equation: 



-6a-3(a-12)=6(a-9)

We move all terms to the left:

-6a-3(a-12)-(6(a-9))=0

We multiply parentheses

-6a-3a-(6(a-9))+36=0



We calculate terms in parentheses: -(6(a-9)), so:

6(a-9)

We multiply parentheses

6a-54

Back to the equation:

-(6a-54)



We add all the numbers together, and all the variables

-9a-(6a-54)+36=0

We get rid of parentheses

-9a-6a+54+36=0

We add all the numbers together, and all the variables

-15a+90=0

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

-15a=-90

a=-90/-15

a=+6

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