x+2x=12+1

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Solution for x+2x=12+1 equation: 



x+2x=12+1

We move all terms to the left:

x+2x-(12+1)=0

We add all the numbers together, and all the variables

x+2x-13=0

We add all the numbers together, and all the variables

3x-13=0

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

3x=13

x=13/3

x=4+1/3

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