Question

A and B are both positive integers. Which expression is equivalent to - A-(-B)?

B-A
-A-B
A-B
A+B


Help

Answer 1

Answer: B-A

Explanation:

We know that it is -A - (-B)

The negative sign on the A stays as it is, eliminating choices A-B and A+B.

For the sign in front of B, a double negative creates a positive. - (-B) is essentially -1 x -B, which is B. You can check this through your calculator.

Therefore, the answer is -A+B, or B-A. Hope it helps!