Question

2. Mai also got the expression 7x 1 and wrote her answer as 7x + (−1). Are the two

expressions equivalent? How do you know?

Answer 1

Yes, the answers are equivalent.

Explanation:

The answers are equivalent because when adding a positive to something it does not change the value of the number. So by adding the + in front of the -1 the value of -1 does not change in the equation.

Hope this helps!!