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x+3+2x=3+x
We move all terms to the left:
x+3+2x-(3+x)=0
We add all the numbers together, and all the variables
x+2x-(x+3)+3=0
We add all the numbers together, and all the variables
3x-(x+3)+3=0
We get rid of parentheses
3x-x-3+3=0
We add all the numbers together, and all the variables
2x=0
x=0/2
x=0
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