Substitution in Algebra

This video tutorial explains the concept of substitution in algebra, where letters in expressions represent unknown values called variables. Substitution involves replacing these letters with given numbers to evaluate the expression. The video provides examples of evaluating expressions with different values for variables, including more complex cases with multiple variables. It concludes with practice questions for viewers to apply what they've learned.

What does substitution mean in algebra?

How do we evaluate an expression after substituting a variable with a number?

What is the result of the expression when g = 5?

How do you substitute values into an expression with two variables?

What should you do if a variable appears multiple times in an expression?