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In a mail order catalogue, a cassette recorder costs $10 less than a clock radio, and a portable stero cont...

In a mail order catalogue, a cassette recorder costs $10 less than a clock radio, and a portable stereo costs twice as much as a clock radio. Three cassette recorders and two portable stereos cost $250 in all. What is the cost of a clock radio?

Public Comments

1. C = CR - 10 PS = 2CR 3C + 2PS = 250 3(CR-10) + 2(2CR) = 250 3CR - 30 + 4CR = 250 7CR = 280 CR = 40 Clock Radios cost $40
2. x=clock radio x-10=cassette recorder 2x=portable sterio 3(x-10)+2(2x)=250 3x-30+4x=250 7x=280 x=40