KöMaL 2006 K78
If the measure of the surface area of a cuboid (in unit squares) is subtracted from the sum of the measures of its edges (in length units), and the measure of the volume of the cuboid (in unit cubes) is added to the number obtained, the result will be 8. Prove that the measure of one of the edges is 2.
Official text KöMaL. Quoted with source.
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