A set contains four numbers. The six pairwise sums of distinct elements of the set, in no particular order, are 189,320,287, 234, x, and y. Find the greatest possible value of x+y.
A set contains four numbers. The six pairwise sums of distinct elements of the set, in no particular order, are 189,320,287, 234, x, and y. Find the greatest possible value of x+y.