SOLUTION: having trouble with this problem: find f^-1(I mean inverse)(x), given f(x)=5x-4 thanks so much

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Question 101722: having trouble with this problem: find f^-1(I mean inverse)(x), given f(x)=5x-4 thanks so much
Answer by stanbon(48535) About Me  (Show Source):
You can put this solution on YOUR website!
find f^-1(I mean inverse)(x), given f(x)=5x-4 thanks so much
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y = 5x-4
Interchange x and y :
x = 5y-4
Solve for y:
5y=x+4
y = (1/5)x + (4/5)
That is the inverse of y=5x-4
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Cheers,
Stan H.