Respuesta :

Answer:

-5f    +6

Step-by-step explanation:

-4f - 9 - f + 15

Combine like terms

-4f -f    -9 +15

-5f    +6

Answer:

-5f+6

Step-by-step explanation:

as we add like terms -4f+(-f)=-5f

-9+15=6

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