Khan Academy Static

Expression like (4x + 5), which contains the variable x, cannot be evaluated. Only if x is given some value, an expression like (4x + 5) can be evaluated. In this topic we will learn how to evaluate exponential equations, we will write expressions variables and learn how to solve them when the value of the variable is specified.

8283_Expressions_with_two_variables.html

8282_Evaluating_an_expression_with_one_variable.html

8278_Writing_expressions_with_variables.html

8281_Writing_algebraic_expressions_example_3.html

8280_Writing_algebraic_expressions_example_2.html

8279_Writing_expressions_with_variables_parentheses.html