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3+2x+1=2x+4
We move all terms to the left:
3+2x+1-(2x+4)=0
We add all the numbers together, and all the variables
2x-(2x+4)+4=0
We get rid of parentheses
2x-2x-4+4=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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