X-x+2x+x=3

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Solution for X-x+2x+x=3 equation: 



X-X+2X+X=3

We move all terms to the left:

X-X+2X+X-(3)=0

We add all the numbers together, and all the variables

3X-3=0

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

3X=3

X=3/3

X=1

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