4+7-f=-9+f

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Solution for 4+7-f=-9+f equation: 



4+7-f=-9+f

We move all terms to the left:

4+7-f-(-9+f)=0

We add all the numbers together, and all the variables

-f-(f-9)+4+7=0

We add all the numbers together, and all the variables

-1f-(f-9)+11=0

We get rid of parentheses

-1f-f+9+11=0

We add all the numbers together, and all the variables

-2f+20=0

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

-2f=-20

f=-20/-2

f=+10

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