This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Percent mixture problems
There are two important facts in the percent mixture problems: the percent in each mixture and the amount /quantity of each mixture. You'll typically be taking two mixtures and putting them into one pot to make a third mixture, and will be asked to calculate either the percent or the quantity of one of the mixtures. E.g.
Find out how many gallons of a 15% acid solution must be mixed with 5 gal of a 20 % acid solution to make an 18% solution?
This problem can be written in the form of the equation:
.15 x + 1 =.18(5 + x)
When we simplify it, value of x = 33.3 i.e. we'll need 33.3 gallons of the 15% acid solution.
This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Algebra I. Click on the video below to go through it. If you like it, you can buy our online course in Algebra I by clicking here.
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