math please help!!
posted by Angela G .
Solve the problem. Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?

.249*100=.20X+ .27(100x)
solve for X 
so then would it be 6 ounces of 20% alloy?