(x) = ![\frac{2x}{x-3}](https://tex.z-dn.net/?f=%5Cfrac%7B2x%7D%7Bx-3%7D)
let y = f(x), then rearrange making x the subject
y =
( multiply both sides by (x - 2 ))
y(x - 2 ) = 3x (distribute )
xy - 2y = 3x ( subtract 3x and add 2y to both sides )
xy - 3x = 2y (factor out x on left side )
x(y - 3 ) = 2y ( divide both sides by (y - 3) )
x = ![\frac{2y}{y-3}](https://tex.z-dn.net/?f=%5Cfrac%7B2y%7D%7By-3%7D)
change y to x for inverse function
(x) = ![\frac{2x}{x-3}](https://tex.z-dn.net/?f=%5Cfrac%7B2x%7D%7Bx-3%7D)
Answer:
Y - X = 1.5
Step-by-step explanation:
Y = 3
X = 1.5
All you do is add up all your sides! So if your shape has 4+4+5+5 = 18. All you do is add them up!
If $1 is 75 yen and there is $25, multiply 25*75 to get the total amount of yen. 25*75 = 1875 yen was what he had to pay