3x+9x-11=13

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Solution for 3x+9x-11=13 equation: 



3x+9x-11=13

We move all terms to the left:

3x+9x-11-(13)=0

We add all the numbers together, and all the variables

12x-24=0

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

12x=24

x=24/12

x=2

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