Answer:
D
Step-by-step explanation:
x+3x=2+2
4x=4
x=1
Firstly
f(x)=3x-2=y then
Interchanging x and y we get
x=3y-2
x+2=3y
y=(x+2)/3
f-1(x)=(x+2)/3
f-1(13)=(13+2)/3
f-1(13)=5
i- umm- its, well i got two answers n this question as well, but umm, i think its
1 5/12 maybe
