Ava bought some pens for $ 2 $ 2 each and some pencils for $ 1 $ 1 each. She bought 3 3 more pens than pencils and spent a total

Question

2 years ago

7

of $ 12. $ 12. How many pencils did Ava buy?

1 answer:

zalisa [80] · Answer 1 · 2022-06-09T21:22:11+03:00

Answer:

Number pencils Ava bought = 2

Explanation:

Price of pen = 2 $

Price of pencil = 1 $

Total money spent = 12 $

Let the number of pen be a and number of pencil be b.

2 a + b = 12 -----------------------------------Equation 1

We have, she bought 3 more pens than pencils

a - b = 3 -------------------------------------- Equation 2

Equation 1 +Equation 2,

2 a + b + a - b = 12 + 3

3a = 15

a = 5

Substituting in equation 2

5 - b = 3

b = 2

Number pencils Ava bought = 2