SOLUTION: find the inverse of f(x)=5x + 4

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Question 121270: find the inverse of f(x)=5x + 4
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=5x+%2B+4 Start with the given function


x=5f%28x%29+%2B+4 Interchange x and f(x)


Now solve for f(x)


x-4=5f%28x%29 Subtract 4 from both sides


%28x-4%29%2F5=f%28x%29 Divide both sides by 5


f%28x%29=%281%2F5%29x-4%2F5 Break up the fraction



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Answer:
So the inverse function is


f%28x%29=%281%2F5%29x-4%2F5