Mario charges $20 an hour plus a $15 flat fee. Luigi charges $18 an hour plus a $30 flat fee. After how many hours will the cost be the same?

Nouman asked Sep 6, 2023

39,553 views

11 votes

Nouman asked Sep 6, 2023

2.8k points

Your comment on this question:

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Email me at this address if my answer is selected or commented on:Email me if my answer is selected or commented on

Privacy: Your email address will only be used for sending these notifications.

13 votes

Answer:

7.5 hours

Explanation:

if x is the hours, then

Mario will charge 20x + 15

Luigi will charge 18x + 30

so 20x + 15 = 18x + 30

20x - 18x = 30 - 15

2x = 15

x = 7.5 hours

Zhengyang Liu answered Sep 10, 2023

2.8k points

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

1.6m questions

2.0m answers