SOLUTION: laura and dan use a metal alloy that is 21% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 25% alloy to form 78 ounces of the desired alloy

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: laura and dan use a metal alloy that is 21% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 25% alloy to form 78 ounces of the desired alloy       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 844850: laura and dan use a metal alloy that is 21% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 25% alloy to form 78 ounces of the desired alloy
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.19x+.25y=78*.21,
x+y=78
http://www.algebra.com/algebra/homework/word/mixtures/Mixture_Word_Problems.faq.question.25157.html