21f+20=-16

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Solution for 21f+20=-16 equation: 



21f+20=-16

We move all terms to the left:

21f+20-(-16)=0

We add all the numbers together, and all the variables

21f+36=0

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

21f=-36

f=-36/21

f=-1+5/7

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