3x-9=x+4+x

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Solution for 3x-9=x+4+x equation: 



3x-9=x+4+x

We move all terms to the left:

3x-9-(x+4+x)=0

We add all the numbers together, and all the variables

3x-(2x+4)-9=0

We get rid of parentheses

3x-2x-4-9=0

We add all the numbers together, and all the variables

x-13=0

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

x=13

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