9x+3x=168

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Solution for 9x+3x=168 equation: 



9x+3x=168

We move all terms to the left:

9x+3x-(168)=0

We add all the numbers together, and all the variables

12x-168=0

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

12x=168

x=168/12

x=14

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