


Description 



Addition Property of Equality: Adding the same number to each side of an equation produces an equivalent expression. 
Examples of Addition Property of
Equality
Suppose we had the equation a = b. When we
add the same number, say 3, to both sides of the equation, we still have a balanced equation:
a + 3 = b + 3.
To look at it in a different way, consider the following
balance scale.
The scale is balanced with 1 box on each side. If we place 3
balls on each side of the scale, the scale remains balanced.
We could write this mathematically, using x to represent the weight of one box as:
x = x x + 3 = x + 3.
NonExamples
Adding different numbers will not produce a balanced equation.
Here we added 5 balls to one side of the scale and only 3 balls
to the other side. As a result, the scale becomes unbalanced.


