Olivea

I'm not really sure on how to prove statements are right with properties as reasons. How would you solve this? If x + c = 0, then x = -c Statements: 1. x+c=0 2. (x+c)+(-c) = 0 + (-c) 3. x + [c+(-c)] = 0 + (-c) 4. x + 0 = 0 + (-c) 5. x = (-c) Would 5 be th...

Does that mean 1 would be be reasoned by the substitution property?

Oh, thank you. For number 2, I originally had the definition of addition, but I was marked wrong. I'm not very sure, but wouldn't it be considered the definition of addition if you were adding (-c) to both sides? And also, in this case x+c would equal 0 s...