We are given the equation:
4 x = 20
To get to x = 5, what was did was to divide both sides by 4.
That is:
4 x / 4 = 20 / 4
x = 5
Therefore in this case, the property which justifies the statement
is the Division Property of Equality. Which states if one side is divided by a number, then the other side should be also divided with the same number.
