Khan Academy on a Stick

Expressions with two variables

Basics of expression with two variables

Variables and expressions

What is a variable?
Why aren't we using the multiplication sign?
Evaluating an expression example
Evaluating an expression using substitution
Evaluating exponential expressions 2
Expressions with two variables
Example: Evaluating expressions with 2 variables
Examples of evaluating variable expressions
Evaluating an expression in a word problem

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This collection was created November 2014.