<PRE><B>Question 1009740</B>
The bill for repair of a washing machine was $230. The cost for the parts was $45. The repairman worked for 1 hour and 30 minutes on the machine. What was the labor cost per hour? 
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C(x) = 45 + (3/2)x, where x is labor cost per hour
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Solve::
45 + (3/2)x = 230
(3/2)x = 170
x = $113.33
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Cheers,
Stan H.
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