Angel is 8 years old and Alex is 30 years old x-y=30
Neither A nor B because there is an input value that repeats for both tables.
What are all the options?
Where’s your z? incomplete question
Alrighty, a hack I will hsow you
if f(a)=b then f⁻¹(b)=a
and
if f⁻¹(a)=b then f(b)=a
so we want to find f⁻¹(5)=?
well, by the above 'hack', if f⁻¹(5)=z then f(z)=5
find what value of x will make f(x)=5

times 2 both sides
10=x-1
add 1
11=x
the answer is 11