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2x+6+5x-21=7x-39
We move all terms to the left:
2x+6+5x-21-(7x-39)=0
We add all the numbers together, and all the variables
7x-(7x-39)-15=0
We get rid of parentheses
7x-7x+39-15=0
We add all the numbers together, and all the variables
24!=0
There is no solution for this equation
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