Question

Simplify (x - y + 1) - (x + y - 1).
-2x + 2y
-2y + 2
2y-2
2x - 2y + 2

Answer 1

-2y + 2

Explanation:

(x - y + 1) - (x + y - 1)

remove ( )

= x - y + 1 - x - y + 1

simplify

= -2y + 2

Answer 2

-2y + 2

Explanation:

Let's first remove the parentheses. (x - y + 1) becomes x - y + 1 and -(x + y - 1) becomes -x -y + 1. Combine like terms:

x - y + 1 - x - y + 1 = -2y + 2