181 + (-417) = -236
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417
A positive integer plus a positive integer is equal to a positive integer. For example, 2 + 2 = 4. The two digits being added together are called the addends, while the answer is called the sum.
The first integer must equal 77 - 69 = 8 , since doubling it increases the sum by this amount. Similarly, the second integer must = 91 - 69 = 22. Then the third integer is 69 - 22 - 8 = 39.
3 is the smallest integer that cannot be written as the sum of two squares. This is easy to see, since the only squares less than or equal to 3 are 0 and 1.
sum of positive integers will be a positive integer