Expressions and Variables - What is a Variable - ALGEBRA I

The video tutorial introduces the concept of variables in math, explaining their role as placeholders for unknown numbers. It uses the example of solving the equation 2x + 3 = 15 to demonstrate how to find the value of a variable. The tutorial concludes by reinforcing the idea that variables represent unknowns in mathematical expressions.

What does it mean when we say a variable is a placeholder?

Can you explain the significance of variables in mathematical expressions?