3X + 3 = 1020 3X + 3 - 3 = 1020 - 3 3X = 1017 3X/3 = 1017/3 X = 339 Which means that the first number is 339, the second number is 339 + 1 and the third number is 339 + 2. Therefore, three consecutive integers that add up to 1020 are 339, 340, and 341.