SOLUTION: How many ounces of glycerin must be added to 50 ounces of a 75% solution to make it an 80% solution?

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Question 915699: How many ounces of glycerin must be added to 50 ounces of a 75% solution to make it an 80% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Mixture: one material quantity unknown
http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev