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2/5f=20
We move all terms to the left:
2/5f-(20)=0
Domain of the equation: 5f!=0We multiply all the terms by the denominator
f!=0/5
f!=0
f∈R
-20*5f+2=0
Wy multiply elements
-100f+2=0
We move all terms containing f to the left, all other terms to the right
-100f=-2
f=-2/-100
f=1/50
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