Question

find three consecutive no. whose sum is -72

Answer 1

x-1 + x + x+1 = -72
3x = -72
x = -24
Therefore the numbers are -25, -24 and -23.

Answer 2

Let the three consecutive numbers be x,x+1 and x+2
A/Q
$x + x + 1 + x + 2 = - 72 \\ = > 3x = - 75 \\ = > x = \frac { 75}{3} \\ = > x = - 25 \\ so \: the \: numbers \: are \: - 25 \: - 24 \: and \: - 23$