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

-2x + 2y

-2y + 2

2y - 2

2x - 2y + 2

-2y + 2

Step-by-step explanation:

First you need to get rid of the parentheses. To do this you need to take note in the sign before and simplify to get:

x - y + 1 - x - y + 1

Because of the negative, you have to change the signs of the second parenthesis. Then you combine like terms to get:

0x - 2y + 2

And you simplify even further to get your final answer:

-2y + 2