Math Triangles

Let us recall the basic knowledge of mathematics in schools, and how unusual it looked examples. In this case, our example is a triangle of balls, which like all triangles have three sides. On each side 3 empty boring ball that need to decorate the figures, but only so that the sum of all the balls on the same face was equal to the reference, with all it's the same faces. Set of numbers is limited, and we have to be content with what we have.