Cancel the 2 to get x then x-1 divided by x
That looks linear
As both x and y go in a pattern
x is +3
y is -2
I am going to assume 2.5x is really 25x (typo).
First formulate the equality

Now two results emerge.
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Hope this helps.
There's no attachment shown. But the technique here is just simple.
You should get the surface area of the box. After getting the surface area of the box, get also the total area of the wrapping paper.
Make sure the total area of the wrapping paper should be equal to the surface area of the box.