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3+21x-7x=3+14x
We move all terms to the left:
3+21x-7x-(3+14x)=0
We add all the numbers together, and all the variables
21x-7x-(14x+3)+3=0
We add all the numbers together, and all the variables
14x-(14x+3)+3=0
We get rid of parentheses
14x-14x-3+3=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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