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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3(a-1)+6=0

We multiply parentheses

-3a+3+6=0

We add all the numbers together, and all the variables

-3a+9=0

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

-3a=-9

a=-9/-3

a=+3

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