Answer:
62
Step-by-step explanation:
The first number = y
2nd number = y + 1
3rd number = y + 2
4th number = y + 3
5th number = y + 4
6th number = y + 5
7th number = y + 6
8th number = y + 7
9th number = x + 8
y + y + 1 + y + 2 + y + 3 + y + 4 + y + 5 + y + 6 + y + 7 + y + 8 = 279
9y + 36 = 279
9y + 36 - 36 = 279 - 36
9y = 243
9y ÷ 9 = 243 ÷ 9
y = 27
y + 8 = 27 + 8
27 + 8 = 35
35 + 27 = 62
