It is definitely the letter B because of the liner parent function
The correct answer is b) 2
F(x)=x-5
f(4)=x-5
f(4)=4-5
f(4)=-1
To solve the given equation, w need to review some rules:

The given equation is :


⇒⇒⇒⇒ rule (2)

⇒⇒⇒⇒ rule (1) and rule (2)

⇒⇒⇒⇒ rule (3)
removing the nature logarithm from both sides

∴ x = 4
So, the correct answer is option (2) ⇒⇒⇒⇒ x = 4
It is A because
x/6 gives pizza by 1 guest and adding0.5 gives total expence