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x+3+x=x+2243
We move all terms to the left:
x+3+x-(x+2243)=0
We add all the numbers together, and all the variables
2x-(x+2243)+3=0
We get rid of parentheses
2x-x-2243+3=0
We add all the numbers together, and all the variables
x-2240=0
We move all terms containing x to the left, all other terms to the right
x=2240
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