3(x-4)+18=-21

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Solution for 3(x-4)+18=-21 equation: 



3(x-4)+18=-21

We move all terms to the left:

3(x-4)+18-(-21)=0

We add all the numbers together, and all the variables

3(x-4)+39=0

We multiply parentheses

3x-12+39=0

We add all the numbers together, and all the variables

3x+27=0

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

3x=-27

x=-27/3

x=-9

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