-20=4f-16

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Solution for -20=4f-16 equation: 



-20=4f-16

We move all terms to the left:

-20-(4f-16)=0

We get rid of parentheses

-4f+16-20=0

We add all the numbers together, and all the variables

-4f-4=0

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

-4f=4

f=4/-4

f=-1

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