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f-8/9=5/9f=
We move all terms to the left:
f-8/9-(5/9f)=0
Domain of the equation: 9f)!=0We add all the numbers together, and all the variables
f!=0/1
f!=0
f∈R
f-(+5/9f)-8/9=0
We get rid of parentheses
f-5/9f-8/9=0
We calculate fractions
f=0
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