-3(3a-4)=-15

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Solution for -3(3a-4)=-15 equation: 



-3(3a-4)=-15

We move all terms to the left:

-3(3a-4)-(-15)=0

We add all the numbers together, and all the variables

-3(3a-4)+15=0

We multiply parentheses

-9a+12+15=0

We add all the numbers together, and all the variables

-9a+27=0

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

-9a=-27

a=-27/-9

a=+3

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