Example How many integer solutions does the equation X+x2+X3=ll have, where X1,X2,and x3 are non-negative integers Solution To count the number of solutions, we note that a solution corresponds to a way of selecting ll items from a set with three elements▪ Example How many integer solutions does the equation x1+x2+x3=11 have, where x1 ,x2 ,and x3 are non-negative integers? ▪ Solution To count the number of solutions, we note that a solution corresponds to a way of selecting 11 items from a set with three elements