Question
A hi-fi system costs $156 less than a hard drive. A mobile phone costs twice as much as a hard drive. Given that the total cost of a hi-fi system, a hard drive and a mobile phone cost $6000, find the cost of the hi-fi system.
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A hi-fi system costs $156 less than a hard drive. A mobile phone costs twice as much as a hard drive. Given that the total cost of a hi-fi system, a hard drive and a mobile phone cost $6000, find the cost of the hi-fi system.