The sum of 3 consecutive odd numbers is 51 what is the second number in the sequence

Consecutive means oneright after another, right. So it's asking for three numbers, that are one after the other;

let x be the first number, then the next number - x+1; x+2

so the three cinsecutive numbers would be;

x, x+1, x+2

so we have;

Find 3 consecutive integers with the sum of 51.

x+x+1+x+2=51

add like terms;

3x+3=51

3x=48

x=16

x+1=17

x+2=18

Find 3 consecutive integers whose sum is - 15.

x+x+1+x+2=-15

3x+3=-15

3x=-18

x=-6

x+1=-5

x+2=-4

Find 4 consecutive integers whose sum is 30.

x+x+1+x+2+x+3=30

4x+6=30

4x=24

x=6

x+1=7

x+2=8

x+3=9

understand?