Question

the sum of two is (-15) .If one of the integer is 21,find the other

Answer 1

x+21=-15,

x=-15-21=-36

Answer 2

this answer is an example of your question seeing this solve yours

Sum of 2 integers = -15= z

First Number = 9 =x

Second Number = ? = y

x+y=z --- Equation 1

9+y= -15 --- Equation 2

y= -15 - (9)

y= -24

Therefore, Second Number = -24