Question

Tomas bought 3 software apps and 2 e-books for a total of $21. The two e-books cost $12. If s represents the cost of each app, the total cost of all 5 items is represented by mc021-1.jpg. Which statement about verifying the solution for s is true?

Answer 1

s=3

Explanation:

Answer 2

First compute the cost of the three apps:

`21-12=9`
The cost of the three apps is $9 then.
Since s is the price of the apps, we deduce the equation:

`3s=9` which means that
`s=3`