Question

The sum of 3 consecutive odd integers is -21. Find the "middle" number. ?

Answer 1

Also post your attempt. This will allow OS community to know exactly where you need help.

Answer 2

It's -7.

Answer 3

Because -6 + -7 + -8 = -21!

Answer 4

thanks @xxxkittyxxx (:

Answer 5

You're welcome!

Answer 6

x = 1st integer
x + 2 = 2nd integer
x + 4 = 3rd integer

x + x + 2 + x + 4 = -21 -- combine like terms
3x + 6 = -21
3x = -21 - 6
3x = - 27
x = -9

x + 2 = -9 + 2 = -7
x + 4 = -9 + 4 = -5

your numbers are : -5,-7,-9
your middle number is -7