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-40/f=-5
We move all terms to the left:
-40/f-(-5)=0
Domain of the equation: f!=0We add all the numbers together, and all the variables
f∈R
-40/f+5=0
We multiply all the terms by the denominator
5*f-40=0
We add all the numbers together, and all the variables
5f-40=0
We move all terms containing f to the left, all other terms to the right
5f=40
f=40/5
f=8
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