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1/y+1/28=1/21
We move all terms to the left:
1/y+1/28-(1/21)=0
Domain of the equation: y!=0We add all the numbers together, and all the variables
y∈R
1/y+1/28-(+1/21)=0
We get rid of parentheses
1/y+1/28-1/21=0
We calculate fractions
There is no solution for this equation
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