<PRE><B>Question 1032486</B>
 Problem: 
Ring-A-Ding Phone Company charges each customer $160 for telephone installation, plus $40 per month for service. 
R(x) = 160+40x
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Dial Tone Phone Company charges $210 for telephone installation, plus $30 per month for service.
D(x) = 210+30x
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 A customer who signs up for Dial Tone will pay the same total amount for his or her telephone as a customer who signs up for Ring-A-Ding if each pays for installation and service for how many months? 
Possible Answers are: 4 months, 5 months, 7 months, and 9 months.
160+40x = 210+30x
10x = 50
x = 5 months
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Cheers
Stan H.
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