Answer: 180, 185, & 190
Explanation:
1st #: 5x
2nd #: 5(x + 1)
3rd #: 5(x + 2)
1st # + 2nd # + 3rd # = sum
5x + 5(x + 1) + 5(x + 2) = 555
15x + 15 = 555
15x = 540
x = 36
1st #: 5x = 5(36) = 180
2nd #: 5(x + 1) = 5(36 + 1) = 185
3rd #: 5(x + 2) = 5(36 + 2) = 190