Answer:
Both the addition property of equality and the additive identity property
Step-by-step explanation:
we know that
The <u>addition property of equality</u> states that if the same amount is added to both sides of an equation, then the equality is still true
The <u>additive identity property</u> says that if you add a real number to zero or add zero to a real number, then you get the same real number back
we have
step 1
Applying the addition property of equality adds 3p both sides
step 2
Applying the additive identity property
step 3
step 4
