Evaluating Multiple Step Algebraic Expressions by Substitution

This video tutorial teaches how to evaluate algebraic expressions by substituting numbers for variables. It emphasizes the importance of following the order of operations: parentheses, exponents, multiplication/division, and addition/subtraction. The tutorial provides examples of evaluating expressions with a single variable and demonstrates how to substitute different values into an expression to find its value.

Explain how to substitute a value for a variable in an algebraic expression.

What is the final value of the expression 9 * X + 3 when X = 3?

When evaluating the expression 50 - 5 * X, what do you get when X = 4?