Question

A school buys pens and pencils from a supplier. The supplier charges $0.05 for each pencil and $0.25 for each pen. The school pays $400 for the pens and pencils.

If the school bought 1,500 pencils, how many pens did the school buy?


please help

Answer 1

1300 pens

Step-by-step explanation:

Set up equations where p is pencil, q is pens

Equation's:

1st equation: 0.05p + 0.25q = 400

2nd equation: p = 1500

Insert equation 2 into 1:

0.05(1500) + 0.25q = 400

75 + 0.25q = 400

0.25q = 325

q = 325/0.25

q = 1300