A computer store sells new computers for $500 and refurbished computers for $200. In March, the store sold 20 computers for $6,400, meaning they sold __?__ refurbished computers.

Question

Quizplus · Accepted Answer

Step1. What do we need to find? The number of refurbished computers sold in March.
Our variables are:
R = refurbished
20-R = new
Step 2. Describe with an equation.
200r + 500(20-r) = 6,400
200r + 10,000 - 500r = 6,400
-300r = -3600
300r = 3600
300r/300 = 3600/300
r = 12

A Computer Store Sells New Computers for $500 and Refurbished