There are many pairs of numbers that can be added together to equal 18. For example, 10 and 8, 15 and 3, or 9 and 9 all sum to 18. Additionally, you can use fractions or decimals, such as 17.5 and 0.5, to achieve the same result. The possibilities are virtually endless!
-22
16 and 2
-19 + 1 = -18
18
-3 and 6
-22
226
16 and 2
-19 + 1 = -18
-1 and 18
18
-3 and 6
-358
-154
18 & 19.
That's obviously impossible. There is no answer. :P
56