posted by Kate .
A piece of cardboard has a length of 60cm and a width of 40cm. In order to make the cardboard into an open box, a box with no lid), a piece of length x must be cut out of each corner.
Write an equation to represent each dimension of the box.
From each side, the cut at each end is x, so the length and width left is 60-2x and 40-2x respectively.
The height, when the sides are folded, is x.