63
-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.
183
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 !
Three numbers that are the same and equal 60 but are not 20 are 30, 30, and 30. This is because when you add 30 + 30 + 30, you get 90, which is the total sum of the three numbers. Each number is equal to 30, not 20, and when combined, they add up to 90, not 60.
79