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X+1/7=2X+1/21
We move all terms to the left:
X+1/7-(2X+1/21)=0
We add all the numbers together, and all the variables
X-(+2X+1/21)+1/7=0
We get rid of parentheses
X-2X-1/21+1/7=0
We calculate fractions
There is no solution for this equation
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