7x+3x-x-12=6x+15

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Solution for 7x+3x-x-12=6x+15 equation: 



7x+3x-x-12=6x+15

We move all terms to the left:

7x+3x-x-12-(6x+15)=0

We add all the numbers together, and all the variables

9x-(6x+15)-12=0

We get rid of parentheses

9x-6x-15-12=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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