7=25-f

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Solution for 7=25-f equation: 



7=25-f

We move all terms to the left:

7-(25-f)=0

We add all the numbers together, and all the variables

-(-1f+25)+7=0

We get rid of parentheses

1f-25+7=0

We add all the numbers together, and all the variables

f-18=0

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

f=18

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