The answer to finding x is -2/3 or 4/3
The formula to find the area of a triangle is:

Plug in what we know:

Multiply:
1. m<13
2. y>2
3. p>-3
I don't know the answers for the last two
Fun fact
if f(a)=b then f⁻¹(b)=a
so
if f⁻¹(b)=a then f(a)=b
so we find f(x)=27 and the solve for x
f(x)=3x=27
3x=27
divide both sides by 3
x=9
so if f(9)=27 then f⁻¹(27)=9
problem solved
answer is 9