3x+1x=9

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Solution for 3x+1x=9 equation: 



3x+1x=9

We move all terms to the left:

3x+1x-(9)=0

We add all the numbers together, and all the variables

4x-9=0

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

4x=9

x=9/4

x=2+1/4

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