The sum of three consecutive odd integers is -15 what are the three integers?

Question

5091 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-02-12T08:42:10

The three consecutive integers are -7, -5, -3

The three consecutive odd integers can be represented algebraically by

#n#
#n+2#
#n+4#

Since they are odd the increases must be by units of two.

The sum of the three numbers is -15

#n + n + 2 + n + 4 =-15#
#3n +6 =-15#
#3n +6 -6 =-15 -6#
#3n = -21#
#(3n)/3 = -21/3#
#n = -7#
#n+2 = -5#
#n+4 = -3#