Staples sells cds ($2.00) and boxes of computer paper ($3). If total sales were $1,560 and customers bought 5 times as many cds as boxes of computer paper, how many cds were sold?

Question

Mathematics

Laura Berger

16 January, 17:35

Staples sells cds ($2.00) and boxes of computer paper ($3). If total sales were $1,560 and customers bought 5 times as many cds as boxes of computer paper, how many cds were sold?

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Answers (1)

Know the Answer?

Johnathon Lawrence · Answer 1

Solution:

CDs: c, Boxes of computer paper: p

c = 5p

2c + 3p = 1560 (the total sales of the items equals $1560)

Plug in the variable value:

2 (5p) + 3p = 1560

10p + 3p = 1560

13p = 1560

divide by 13:

p = 120

c = 5 * 120

c = 600

Verify:

2 * 600 + 3 * 120 = 1560

1200 + 360 = 1560

1560 = 1560

Answer: 600 CDs were sold