write the system of equations that models this situation.

Question

lacey bought fancy pens and cds. fancy pens are on sale at $4 each while cds are currently sold at $7 each. of lacey spent $124 and only got 25 items. write the system of equations that models this situation.

Answer 1

4P + 7C = 124

P+C = 25

4P + 4C = 100 subtract from 1st equation to get

3C = 24

C = 8 CDs

P=24-8 = 17 fancy pens