Question

Can someone please help me on my math question? It's proofs

Answer 1

For the second row that has the reason "identity property"
you want to do the same thing as what happened to the other (8p + 3)

Answer 2

@Angle that was a accident my wifi caused 3 messages to send ;-;

Answer 3

Then the third row is using the distributive property

a more simple example is if I tried to do:
1m + 1m
= (1+1)m