Question

I have trouble finding the inverse of this function : f(x)= (x-1000) - 0.15x
Thanks :)

Answer 1

does it really say
\[f(x)=x-1000-.15x\]?

Answer 2

Yes

Answer 3

first step would be to write this as
\[f(x)=.85x-1000\]

Answer 4

Oh ok, and now should I "solve" for x?

Answer 5

write
\[x=.85y-1000\] and solve for \(y\) in two steps

Answer 6

\[x+1000=.85y\]
\[y=\frac{x+1000}{.85}\]

Answer 7

and that is your inverse

Answer 8

Oh, ok I got it! Thanks a lot :)

Answer 9

yw

Answer 10

you might want to clean it up so you don't have a decimal in the denominator

Answer 11

Sure, I will.