SOLUTION: bronze which costs $9.10/kg is made by combining copper which costs $8.90/kg with tin which costs $9.50/kg. Find the number of kg of copper required to make 16.6 kg of bronze?

Question 728071: bronze which costs $9.10/kg is made by combining copper which costs $8.90/kg with tin which costs $9.50/kg. Find the number of kg of copper required to make 16.6 kg of bronze?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = kg of copper needed
Let = kg of tin needed
(1)
(2)
------------------
(1)
Multiply both sides of (2) by
and subtract (2) from (1)
(1)
(2)

and
(2)
(2)
(2)
11.0667 kg of copper is needed
5.5333 kg of tin is needed
check answer:
(1)
(1)
(1)
(1)
close enough

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