The sum of 9 consecutive numbers is 279. what is the sum of the first and the last number

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

36/60

36/2=18

60/2=30

18/30

18/3=6

30/3=10

6/10

6/2=3

10/2=5

your final answer would be 3/5 of an

hope this !