4-7-2f=-7-f

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Solution for 4-7-2f=-7-f equation: 



4-7-2f=-7-f

We move all terms to the left:

4-7-2f-(-7-f)=0

We add all the numbers together, and all the variables

-2f-(-1f-7)+4-7=0

We add all the numbers together, and all the variables

-2f-(-1f-7)-3=0

We get rid of parentheses

-2f+1f+7-3=0

We add all the numbers together, and all the variables

-1f+4=0

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

-f=-4

f=-4/-1

f=+4

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