What is the substitution property?

Answer 1

The substitution property of equality states that for any real numbers a and b if a = b then a can be substituted for b. This means that if a = b then we can change any bto an a or any a to a b. Let x = 5. We can now solve the expression below by substituting: (x + 4)/3 We can change any x to a 5 or any 5 to an x. So lets substitue the 5 in for the x: (5 + 4)/3 = 3. Essentially, the substitution property says that if two things are the same, it doesn't matter which one you use.