3+x+2x=39

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Solution for 3+x+2x=39 equation: 



3+x+2x=39

We move all terms to the left:

3+x+2x-(39)=0

We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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