3(a-4)=-18

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Solution for 3(a-4)=-18 equation: 



3(a-4)=-18

We move all terms to the left:

3(a-4)-(-18)=0

We add all the numbers together, and all the variables

3(a-4)+18=0

We multiply parentheses

3a-12+18=0

We add all the numbers together, and all the variables

3a+6=0

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

3a=-6

a=-6/3

a=-2

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