Question

You buy 8 pencils for $8 at the bookstore. Standard pencils cost $0.85 and specialty pencils cost $1.25. How many specialty pencils did you buy?

Answer 1

We bought 3 specialty pens and 5 standard

Explanation:

1. Let's review the information given to us to answer the question correctly:

Standard pencils cost $0.85

Specialty pencils cost $1.25

You buy 8 pencils for $8

2. How many specialty pencils did you buy?

Number of specialty pencils = x

Number of standard pencils = 8 - x

Let's write our equation to solve for x:

0.85 (8 - x) + 1.25x = 8

6.8 - 0.85x + 1.25x = 8

0.4x = 8 - 6.8

0.4x = 1.2

x = 1.2/0.4

x = 3 ⇒ 8 - x = 5

We bought 3 specialty pens and 5 standard