Question

You know that 3 pencils and 7 pens cost $24, while 3 pencils and 3 pens cost S12.

Answer 1

Answer:

5 pens = 15$ and 4 pencils = 4$

Step-by-step explanation:

7-3=4, so 4 pens is 12$

12/4 = 3, so 1 pen = 3$

Remove the pens from the equation

7x3=21

24-21=3

3/3=1, so each pencil costs 1$

Answer 2

19 dollars. Pens are 3$ each and pencils are 1$ each.