Answer:
f = 4
Explanation:
We start by re organizing the equation so all the numbers and variables that includes f, goes to the left side of the equation, while the rest of the numbers go to the right.
-11f = 7 - 14f + 5
-11f + 14f = 7 + 5
3f = 12
f = 4
I hope you get this now :] If you need any more clarification, feel free to ask me!