42=7f-

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Solution for 42=7f- equation: 



42=7f-

We move all terms to the left:

42-(7f-)=0

We add all the numbers together, and all the variables

-(+7f)+42=0

We get rid of parentheses

-7f+42=0

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

-7f=-42

f=-42/-7

f=+6

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