Question

Elli says 3 + (x + 1) is equivalent to (3 + x) + 1.

Gabe says 3 + (x + 1) is equivalent to 3+ (1 + x).
Who is correct and what property did they use?

Answer 1

They are both correct

Explanation:

Elli says 3 + (x + 1) is equivalent to (3 + x) + 1.

Gabe says 3 + (x + 1) is equivalent to 3 + (1 + x).

Who is correct and what property did they use?

Answer 2

Elli and the associative property of addition

Explanation: