Work. Do Not Solve

work. Do not solve.
-5x + 9y = -12
-4x - 4y = -32
A) Substitution B) Addition
Answer: B
Write the word or phrase that best completes each statement or answers the question.
-Anne and Nancy use a metal alloy that is 19.4% copper to make jewelry. How many ounces of an alloy that is 11% copper must be mixed with an alloy that is 25% copper to form 80 ounces of the
Desired alloy?

A) 53 oz
B) 32 oz
C) 34 oz
D) 48 oz