Since these are all like terms, you're essentially just adding and subtracting here.
[tex]9f + 10f -12f[/tex]
Add [tex]9f[/tex] and [tex]10f[/tex].
[tex]9f + 10f = 19f[/tex]
Then, subtract.
[tex]19f - 12f = 7f[/tex]
Your answer is [tex]7f[/tex].
Answer,
7f
Explanation,
Combine Like Terms:
= 9f + 10f + − 12f
= (9f + 10f + − 12f)
= 7f
Hope This Helps :-)
