SOLUTION: Nick's telescope company charges $0.08 per minute for [weekend] calls and $0.09 per minute for calls made on [weekends]. This month Nick was billed for 612 minutes. The charge for

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Question 720861: Nick's telescope company charges $0.08 per minute for [weekend] calls and $0.09 per minute for calls made on [weekends]. This month Nick was billed for 612 minutes. The charge for these minutes was 54.27 How many minutes did he talk on weekends and how many minutes did he talk on weekdays? Thanks
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
D+W=612
D=612-W
.09W+.08D=54.27
.09W+.08(612-W)=54.27
.09W+48.96-.08W=54.27
.01W=54.27-48.96
.01W=5.31
W=5.31/.01
W=531 MINUTES USED DURING THE WEEKEND?
D+531=612
D=612-531
D=81 MINUTES USED DURING THE WEEKDAYS?
PROOF:
.09*531+.08*81=54.27
47.79+6.40=54.27
54.27=54.27