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(X+4)+3=X+(4+3)
We move all terms to the left:
(X+4)+3-(X+(4+3))=0
We add all the numbers together, and all the variables
(X+4)-(X+7)+3=0
We get rid of parentheses
X-X+4-7+3=0
We add all the numbers together, and all the variables
=0
X=0/1
X=0
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