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3(x+8)-3=3x+21
We move all terms to the left:
3(x+8)-3-(3x+21)=0
We multiply parentheses
3x-(3x+21)+24-3=0
We get rid of parentheses
3x-3x-21+24-3=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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