SOLUTION: How many gallons each of a 5% acid solution and a 20% acid solution to make 3 gallons of a 15% acid solution?

Question 876333: How many gallons each of a 5% acid solution and a 20% acid solution to make 3 gallons of a 15% acid solution?

Found 2 solutions by josgarithmetic, ewatrrr:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
One of the most common mixture questions asked.
See and study the lesson, Mixture: one material quantity unknown ,http://www.algebra.com/tutors/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
.20x + .05(3gal-x) = .15(3gal),
x = .10(3gal)/.15

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