can someone solve this problem please?

Question

Nancy and Adriana use a metal alloy that is 16% copper to make jewelry. How many ounces of
an 11% alloy must be mixe
d with a 24% alloy to form 130
ounces of the desired alloy?

Answer 1

Let x = number of oz of 11% alloy

 

130-x = number of oz of 24% alloy

 

0.11x + 0.24(130-x) = 0.16(130)

 

0.11x + 31.2 - 0.24x = 20.8

 

-0.13x = -10.4

 

x = 80 oz