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3k+10=21+3k
We move all terms to the left:
3k+10-(21+3k)=0
We add all the numbers together, and all the variables
3k-(3k+21)+10=0
We get rid of parentheses
3k-3k-21+10=0
We add all the numbers together, and all the variables
-11!=0
There is no solution for this equation
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