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Question

The XYZ company has to pay 5,000 for rent each month. In addition, their monthly electricity bill is 1.45 per kilowatt-hour of electricity used. If the total cost for both rent and electricity in January was 16,520.25$, how many kilowatt-hours of electricity did they use?

Accepted Answer

If x is the number of kilowatt-hours of power that the company used in January, then the company paid 5000+1.45x dollars for that month. Setting 5000+1.45x=16520.25, we find x=(16520.25-5000)/1.45=7945.