72=3x+6x-9

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Solution for 72=3x+6x-9 equation: 



72=3x+6x-9

We move all terms to the left:

72-(3x+6x-9)=0

We add all the numbers together, and all the variables

-(9x-9)+72=0

We get rid of parentheses

-9x+9+72=0

We add all the numbers together, and all the variables

-9x+81=0

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

-9x=-81

x=-81/-9

x=+9

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