12 x 3
37
The factor pairs of 36 are (36,1)(18,2)(12,3)(9,4) Even considering their negative counterparts, none of them adds up to -60.
-111
The factor pairs of 15 are (15, 1) (5, 3) Neither of them adds up to eight. There is no integral solution to this problem.
-27
-41
48
54
377
37
Try 1 times 75.
71
The factor pairs of 36 are (36,1)(18,2)(12,3)(9,4) Even considering their negative counterparts, none of them adds up to -60.
It is: -6 and -6
18 and 18
-111
The factor pairs of 15 are (15, 1) (5, 3) Neither of them adds up to eight. There is no integral solution to this problem.