16-9f=-7f-20

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Solution for 16-9f=-7f-20 equation: 



16-9f=-7f-20

We move all terms to the left:

16-9f-(-7f-20)=0

We get rid of parentheses

-9f+7f+20+16=0

We add all the numbers together, and all the variables

-2f+36=0

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

-2f=-36

f=-36/-2

f=+18

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