Watch these videos and take notes. While different in context, algebraically the first problem is similar to mixture problems earlier. Note the steps Sal Khan takes to choose a variable, translate all the information given into algebraic expressions, and set up an equation. The second video is another example of a percent mixture problem. This time, the percent concentration in one part of the mixture is unknown.

Last modified: Thursday, July 7, 2016, 2:48 PM