Question 925639
Nick's telephone company charges $0.06 per minute for weekend calls and $0.08 per minute for calls made on weekdays. 
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this month Nick was billed for 558 minutes. 
The charge for these minutes was $35.84. 
How many minutes did he talk on the weekends and how many minutes did he talk on the weekdays?
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Equations::
# of calls:: E + D = 558
Value of calls: 6E + 8D = 3584 cents
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Modify for elimination::
6E + 6D = 6*558
6E + 8D = 3484
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Solve for "D"::
2D = 136
D = 68 (# of weekday calls)
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E = 558-68 = 490 (# of weekend calls)
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Cheers,
Stan H.
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