-1/5f+4/5f+21=6

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Solution for -1/5f+4/5f+21=6 equation: 



-1/5f+4/5f+21=6

We move all terms to the left:

-1/5f+4/5f+21-(6)=0



Domain of the equation: 5f!=0

f!=0/5

f!=0

f∈R



We add all the numbers together, and all the variables

-1/5f+4/5f+15=0

We multiply all the terms by the denominator


15*5f-1+4=0

We add all the numbers together, and all the variables

15*5f+3=0

Wy multiply elements

75f+3=0

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

75f=-3

f=-3/75

f=-1/25

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