2.X-1=x+2

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Solution for 2.X-1=x+2 equation: 



2.X-1=X+2

We move all terms to the left:

2.X-1-(X+2)=0

We get rid of parentheses

2.X-X-2-1=0

We add all the numbers together, and all the variables

X-3=0

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

X=3

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