How do you feel if I say the RM 1 wasn’t there in the first place?
Okay, let’s not confuse you more. Here’s the answer.
Each person paid RM 9 (RM 10 - RM 1) to the receptionist.
Amount paid RM 9 x 3 = RM 27
From that RM 27, tips given to the receptionist = RM 2
Therefore, RM 27 - 2 = RM 25
See that? You MINUS the tips, not add it on. This is where readers are tricked. The tips were paid using the existing RM 27, they didn’t add extra money to pay for the tips. So…
RM 25 rental + RM 5 discount = RM 30 original rental price
P.S.: Congrats to my friend Hasni who managed to solve this :-)