Question 849283
Focus on the percent "gas".  You want to dilute the 3 gallons of 95% "gas" with the unknown quantity of oil which is 0% "gas".  Assign your variable or other variables any way you want.


Study this lesson: <a href="http://www.algebra.com/tutors/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev">Two-Part Mixture with One Material Quantity Unknown</a>