Question

Write an inequality and use substitution to solve the following problem: Chris has 45 dollars saved up. He currently makes 5 dollars each day walking dogs. Chris wants to purchase a new stereo for 72 dollars. Which of the following numbers of days worked will allow Chris to purchase the stereo?

Answer 1

6 and 8 days if your on moby max

Explanation:

Answer 2

5.4 days (6 days)

Explanation:

First set up an equation. (x represents days)

5 dollars a day = 5x ; Already has 45 = +45 ; Needs 72 = =72

That means your equation is...

5x + 45 = 72

Now solve for x.

5x = 27 Subtract 45 from both sides.

x = 5.4 Divide both sides by 5.

This means he will have to work for at least 6 days.

I hope this helped. :) (I love these kinds of problems!)