Please help... I will Medal and fan

Provide the reason for Step 4 in the following proof.

Prove: –(a +b) + a = –b

7bchart.gif

(Points : 4)
Identity Property for Addition
Additive Inverse Property
Definition of Subtraction
Commutative Property of Addition

Question

Please help... I will Medal and fan


 Provide the reason for Step 4 in the following proof.

Prove: –(a +b) + a = –b

7bchart.gif

(Points : 4)
       Identity Property for Addition
       Additive Inverse Property
       Definition of Subtraction
       Commutative Property of Addition

anonymous · Answer

what is -b?

anonymous · Answer

@butterflydreamer ? :)

butterflydreamer · Answer

did you try to insert a link? Because if you attached something, i can't see it

anonymous · Answer

I tried but it's basically just asking what -b is

butterflydreamer · Answer

i have no idea.. but i don't think it is the last one. it could be C?