What are equivalent expressions

The video tutorial explains equivalent expressions, which are expressions that have the same value. It introduces the concept using the equal sign and provides examples like 7 = 7 and 3 * 4 = 4 * 3, illustrating the commutative property. The tutorial also covers properties such as a + 0 = a, emphasizing that expressions can be equivalent even if they look different. Finally, it discusses equations, using examples to show how both sides of an equation can be equal, such as A = 9.

What is the relationship between the left side and the right side of an equation?

How can we determine the value of a in the expression A = 9?