can you solve this problem

Question

Julie spends another Saturday greeting people, but has changed her price. She changes $4 for a phenomenal greeting, and $2.5 for and excellent greeting. During the day she performs twice as many excellent greetings as phenomenal ones. If she spends $16 on snacks, and ends the day with a total profit of $65, how many people did she greet?

Answer 1

E=2P

2.5E+4P-16=65

Use the first equation to substitute in the 2nd and solve for P. One you know P, you can easily derive E and from there the total number of people greeted.