3x+81-9=-3x

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Solution for 3x+81-9=-3x equation: 



3x+81-9=-3x

We move all terms to the left:

3x+81-9-(-3x)=0

We add all the numbers together, and all the variables

3x-(-3x)+72=0

We get rid of parentheses

3x+3x+72=0

We add all the numbers together, and all the variables

6x+72=0

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

6x=-72

x=-72/6

x=-12

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