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