(1-2)
(4-2)
the answer would be
-1/2 :)
This is telling you to find out the dimensions of her house.
I suggest using mathpapa for each equation. It will show you how to solve it and then the answer.
So for the top dimensions, put the following into mathpapa: (2x-10)+(x-2)+(.5x-4)+(x-2)
an eight pack because you get more water and its cheaper that way