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3(x+4)+3=3x+15
We move all terms to the left:
3(x+4)+3-(3x+15)=0
We multiply parentheses
3x-(3x+15)+12+3=0
We get rid of parentheses
3x-3x-15+12+3=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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