2 [Arithmetic. Mental arithmetic, etc.]

There are nuts in the boxes. In the first box, there are 6 kg fewer nuts than in the other two together. And in the second box, there are 10 kg fewer nuts than in the other two together. How many nuts are in the third box?
Of course, we can set up a system of equations, but let's try to do without it.

## Solution

Let's combine both given conditions and obtain the following statement: "In the first and second boxes, there are 6 kg + 10 kg fewer nuts than in the first, second, and two-thirds of the third box." From this, it follows that in two-thirds of the third box, there are 16 kg of nuts, i.e., in the third box, there are 8 kg of nuts.