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2x+(30-2x)=30
We move all terms to the left:
2x+(30-2x)-(30)=0
We add all the numbers together, and all the variables
2x+(-2x+30)-30=0
We get rid of parentheses
2x-2x+30-30=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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