9x+3x=8

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Solution for 9x+3x=8 equation: 



9x+3x=8

We move all terms to the left:

9x+3x-(8)=0

We add all the numbers together, and all the variables

12x-8=0

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

12x=8

x=8/12

x=2/3

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