7-3f=40

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Solution for 7-3f=40 equation: 



7-3f=40

We move all terms to the left:

7-3f-(40)=0

We add all the numbers together, and all the variables

-3f-33=0

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

-3f=33

f=33/-3

f=-11

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