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3x+30=3x+60-30
We move all terms to the left:
3x+30-(3x+60-30)=0
We add all the numbers together, and all the variables
3x-(3x+30)+30=0
We get rid of parentheses
3x-3x-30+30=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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