-1540
55+5=60
60 plus 60 plus 60 equals 180 !
Seven odd numbers added together, if they're all positive, would give an odd number, and thus couldn't be 60. So, the answer to your question is that the only way this is possible is if one, three, or five of the numbers are negative, and the rest positive.
5 and 12
There is no valid mathematical solution to the question.
-1540
41
-43
60 + 60 + 60 = 180
55+5=60
67
(30 + 3√85) ≈ 57.659 (30 − 3√85) ≈ 2.341
There is an endless list of numbers that add together to give 175, an example is 75+60+40.
60 plus 60 plus 60 equals 180 !
79
17 and 43 = 60