4=18-7f

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Solution for 4=18-7f equation: 



4=18-7f

We move all terms to the left:

4-(18-7f)=0

We add all the numbers together, and all the variables

-(-7f+18)+4=0

We get rid of parentheses

7f-18+4=0

We add all the numbers together, and all the variables

7f-14=0

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

7f=14

f=14/7

f=2

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