Question 1007274
a metal worker has a 30% copper and another alloy that is 60% copper. how many killograms of each alloy should the metal worker combine to create 80 kg of a 48% copper alloy

let x=amt of 30% alloy to use
80-x=amt of 60% alloy to use

30%x+60%(80-x)=48%*80
.30x+48-.60x=38.4
.30x=9.6
x=32
80-x=48
amt of 30% alloy to use=32 kg
amt of 60% alloy to use=48 kg