Question

Translate the problem into a mathematical sentence using e as your variable name.

roy bought 16 CDs in December. of those, 7 were world music the rest were electronic music. how many electronic music discs did he buy?

Answer 1

• 9

Explanation:

• Total CD's = 16
• World music = 7
• Electronic music = e

The expression and solution:

• 7 + e = 16
• e = 16 - 7
• e = 9

Roy bought 9 electronic music discs