SOLUTION: Anne and Nancy use a metal alloy that is 20% copper to make jewelry. how many ounces of 14% alloy and a 24% ally must be mixed to form 100 ounces of the desired alloy. pleas

Question 1040660: Anne and Nancy use a metal alloy that is 20% copper to make jewelry. how many ounces of 14% alloy and a 24% ally must be mixed to form 100 ounces of the desired alloy.

please help
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let be the number of ounces of 14% alloy.
Let be the number of ounces of 24% alloy.
So the total weight equation is,
1.
and the total concentration equation is,

2.
Multiply equation 1 by -12 and add to equation 2 to solve for X.

So then from eq. 1,

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