6x+9=-18-3x

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Solution for 6x+9=-18-3x equation: 



6x+9=-18-3x

We move all terms to the left:

6x+9-(-18-3x)=0

We add all the numbers together, and all the variables

6x-(-3x-18)+9=0

We get rid of parentheses

6x+3x+18+9=0

We add all the numbers together, and all the variables

9x+27=0

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

9x=-27

x=-27/9

x=-3

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