Answer:
multiply by 4.5 to get x = 27
Step-by-step explanation:
Both sides should be multiplied by 4.5
x / 4.5 = 6
x = 27
f^-1(x)=3x
y=x/3
to get the inverse function, exchange x and y,
x=y/3
solve for y, y=3x
thats easy it is 4
Hope this helps:)