Answer:
8x³y³
Step-by-step explanation:
When the number is in parentheses, it means the exponent goes to all of the variables and numbers inside. So 2 squared is 8 and x squared and y squared are just written like that. I hope this helps clear things up...
The answer is 39/8
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You just subtract 7 from both sides, this way you isolate f and its calculation is very easy