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2/7x=31/21
We move all terms to the left:
2/7x-(31/21)=0
Domain of the equation: 7x!=0We add all the numbers together, and all the variables
x!=0/7
x!=0
x∈R
2/7x-(+31/21)=0
We get rid of parentheses
2/7x-31/21=0
We calculate fractions
There is no solution for this equation
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