Three consecutive numbers added form 69. what is the third number?

SOLUTION:

Let third number of three numbers = x

x + x - 1 + x - 2 = 69

3x - 3 = 69

3x = 69 + 3

3x = 72

x = 72 / 3

x = 24

FINAL ANSWER:

Therefore, the third number is 24.

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Okay so the answer is 5 & 16.

The work:
Let x = The smaller number

x + (2x + 6) = 21
\ / -6. -6
3x = 15

3x/3 = 15/3

x = 5

Since x is the smaller number, to find the other number you would need to multiply 5 by 2 and add 6 giving you 16 which is the other number. Hence 5+16=21.