7f+20=-18+9f

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Solution for 7f+20=-18+9f equation: 



7f+20=-18+9f

We move all terms to the left:

7f+20-(-18+9f)=0

We add all the numbers together, and all the variables

7f-(9f-18)+20=0

We get rid of parentheses

7f-9f+18+20=0

We add all the numbers together, and all the variables

-2f+38=0

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

-2f=-38

f=-38/-2

f=+19

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