Answer:
f=30
Explanation:
You want to get x by itself on one side, so in order to do that, you need to subtract the 24, and if you do it one side, you need to do it to the other side.
That would give you:
24-24+f=54-24
then simplify it to be:
Answer: 30
24 + f = 54
f = 54 - 24
f = 30
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