Question

Simplify (x - y+ 1) - (x + y - 1).
o-2x + 2y
0-2y = 2
O2y-2
02x - 2y + 2

Answer 1

First, distribute the minus sign across the second set. So you have:

x - y + 1 - x - y + 1

Now, we combine like terms:
x-x=0
-y-y=-2y
1+1=2

So we have -2y+2

Hope that helps.