Anthony paid a 20% tip on a $15 dinner bill. Liam paid a 15% tip on his dinner bill, and left the same dollar amount as the tip Anthony left. How much did Liam's dinner cost, before the tip?
+876 20% of $15 is 15⋅15=$3 tip. 15%= 320. 320x=3⇒120x=1⇒x=20
Liam's dinner cost $20.
-MPS101
