Problema Solution
A metal alloy is 25% copper. Another metal alloy is 50% copper. How much of each alloy should be used to make 1000 grams of a metal alloy that is to be 38% copper?
Answer provided by our tutors
let 'x' represent the grams of 25% alloy used, then '1000-x' represents the grams of 50% alloy used
0.38(1000) = 0.25x + 0.50(1000-x)
solving for 'x' we have x=480
1000-480 = 520
480 grams of 25% alloy should be combined with 520 grams of 50% alloy