Answer: (x + 130, y - 55)
Step-by-step explanation: If the southeast corner of the pole barn is the only reference point, it only requires this one point and not the size of the barn.
Let's set this up first: West/South= Negative x/y, and East/North= Positive x/y.
Currently, the corner is at -50, 25. The corner needs to be moved to 80, -80.
For x: |-50|+80=130
For y: |25|+(-80)=-55
The formula for this is |a|+b=c.
This leaves it with (x + 130, y - 55)