Answer:
f=3.1
Explanation:
-4.8f+6.4=-8.48
6.4-6.4=0
-8.48-6.4=-14.88
-4.8f=-14.88
-4.88f/-4.88=0
-14.88/-4.88=3.1
Answer:F is a unknown number
Step-by-step explanation:Isolate the variable
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