5/7f-8.4=-8.1

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Solution for 5/7f-8.4=-8.1 equation: 



5/7f-8.4=-8.1

We move all terms to the left:

5/7f-8.4-(-8.1)=0



Domain of the equation: 7f!=0

f!=0/7

f!=0

f∈R



We add all the numbers together, and all the variables

5/7f-0.3=0

We multiply all the terms by the denominator


-(0.3)*7f+5=0

We multiply parentheses

-2.1f+5=0

We move all terms containing f to the left, all other terms to the right

-2.1f=-5

f=-5/-2.1

f=2+0.8/2.1

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