SOLUTION: how do I find the inverse of x->3x??? and x->3x-5 Is there a formula I can use? thankyou

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Question 157492: how do I find the inverse of x->3x??? and x->3x-5
Is there a formula I can use? thankyou
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'll do the first one to get you going in the right direction

I'm assuming that the notation x->3x means f%28x%29=3x.


f%28x%29=3x Start with the given function


y=3x Replace f(x) with y


x=3y Switch x and y


x%2F3=y Divide both sides by 3 to isolate y


So the answer is y=x%2F3 which means that the inverse function is