SOLUTION: James sold magazines subscriptions with three prices: $27.00, $11.00 and $12.00. He sold 1 fewer of the $27 subscriptions than of the $11 subscriptions and sold a total of 42 subsc

Algebra ->  College  -> Linear Algebra -> SOLUTION: James sold magazines subscriptions with three prices: $27.00, $11.00 and $12.00. He sold 1 fewer of the $27 subscriptions than of the $11 subscriptions and sold a total of 42 subsc      Log On


   



Question 912007: James sold magazines subscriptions with three prices: $27.00, $11.00 and $12.00. He sold 1 fewer of the $27 subscriptions than of the $11 subscriptions and sold a total of 42 subscriptions. If his total sales amounted to $685.00, how many $12 subscriptions did James sell?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
27x+11y+12z=685
x=y-1
x+y+z=42
x = 13, y = 14, z = 15