Question

What should be added to 25 to get (-15) ?​

Answer 1

Answer:

Let the other no. be x.

15+x=15.

x=15-15.

x=-30.

Hence,the value of x is -30.

Answer 2

Answer:

$25 + x = - 15 \\ x = - 15 - 25 \\ x = - 40$