Answer: In Exercises 41 to 60, solve by using a system of
Chapter , Problem 6.1.47(choose chapter or problem)
In Exercises 41 to 60, solve by using a system of equations.Metallurgy A metallurgist made two purchases. The first purchase, which cost $1080, included 30 kilograms of an iron alloy and 45 kilograms of a lead alloy. The second purchase, at the same prices, cost $372 and included 15 kilograms of the iron alloy and 12 kilograms of the lead alloy. Find the cost per kilogram of the iron and lead alloys.
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