Answer:
Addition property of equality that justifies this statement if p=q then p+s=q+s
Step-by-step explanation:
Addition property of equality states that you add the same number to both sides of an equation.
For example
If a = b then;
a+c = b+c
As per the statement:
if p=q
then;
p+s=q+s
⇒Addition property of equality justifies this statement.
