Question 67103
e = amount of ethanol in gallons
(e(100%) + 1(6%))/(e + 1) = 10%
(e + 0.06)/(e + 1) = 0.1
e + 0.06 = 0.1e + 0.1
0.9e = 0.04
e = 4/90 = 2/45 gallons