Question

The Computer Store sells disks ($1.50) and boxes of computer paper ($2). If total sales were $5,050 and customers bought 7 times as many diskettes as boxes of computer paper, how many diskettes were sold

Answer 1

let the number of computer papers bought be x, the number of disk bought will be 7x.
cost of each disk is $1.50
cost of each computer paper is $2
The total cost will be given by:
Amount=(cost of disk*number of disk)+(cost of computer paper*number of papers)
Amount=5050=1.5(7x)+2(x)
5050=10.5x+2x
5050=12.5x
x=5050/12.5
x=404
the number of computer papers sold was 404 and the number of diskettes sold was 404*7=2828