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-2/3+1/2u=-9/7
We move all terms to the left:
-2/3+1/2u-(-9/7)=0
Domain of the equation: 2u!=0We get rid of parentheses
u!=0/2
u!=0
u∈R
1/2u-2/3+9/7=0
We calculate fractions
There is no solution for this equation
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