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30+(2x)=42+(2x)
We move all terms to the left:
30+(2x)-(42+(2x))=0
We add all the numbers together, and all the variables
2x-(2x+42)+30=0
We get rid of parentheses
2x-2x-42+30=0
We add all the numbers together, and all the variables
-12!=0
There is no solution for this equation
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