Write a System of Equations for the Problem, and Then

Multiple Choice

Write a system of equations for the problem, and then solve the system.
-Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 1500 gallons of gasohol containing 10% alcohol?

A) 75 gal 5%, 180 gal 12%
B) 1071 gal 5%, 1071 gal 12%
C) 429 gal 5%, 1071 gal 12%
D) 625 gal 5%, 875 gal 12%