can someone solve this problem with steps for me ?

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?
2x2 System:

Answer 1

Let e = ounces of 11% alloy

t=ounces of 24% alloy

     e    +t=130            total weight of alloy

.11e+.24t=.16×130=20.8    total weight of copper

rewrite as

     e   +t=130

11e+24t=2080

multiply first equation by 11

11e+11t=1430

11e+24t=2080

subtract

13t=650 and so t=50, which makes e=80