Solve the Problem by Using a System of Equations

Multiple Choice

Solve the problem by using a system of equations.
-A chemist has a 64% solution of alcohol to mix with a 86% solution to get 110 L of a final mixture that is 80% alcohol. How much of each of the original solutions should he use?

A) 33 L of 64%; 77 L of 86%
B) 80 L of 64%; 30 L of 86%
C) 30 L of 64%; 80 L of 86%
D) 33 L of 64%; 80 L of 86%