4/5f=-9

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Solution for 4/5f=-9 equation: 



4/5f=-9

We move all terms to the left:

4/5f-(-9)=0



Domain of the equation: 5f!=0

f!=0/5

f!=0

f∈R



We add all the numbers together, and all the variables

4/5f+9=0

We multiply all the terms by the denominator


9*5f+4=0

Wy multiply elements

45f+4=0

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

45f=-4

f=-4/45

f=-4/45

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