-3f+3-9=-f-4

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Solution for -3f+3-9=-f-4 equation: 



-3f+3-9=-f-4

We move all terms to the left:

-3f+3-9-(-f-4)=0

We add all the numbers together, and all the variables

-3f-(-1f-4)+3-9=0

We add all the numbers together, and all the variables

-3f-(-1f-4)-6=0

We get rid of parentheses

-3f+1f+4-6=0

We add all the numbers together, and all the variables

-2f-2=0

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

-2f=2

f=2/-2

f=-1

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