Question

The sum of two integers is -21. If one of them is 9 find the other ​

Answer 1

Answer:

-30

Step-by-step explanation:

9+x=-21

x=-21-9

x=-30

-30+9=-21

Answer 2

Answer:

$\boxed{ \implies \tt \: - 30}$

Step-by-step explanation:

$\sf \: sum \: of \: two \: integers \: = - 21$

$\sf \: one \: integer \: = 9$

$\therefore \: \: \: \: \sf \: second \: integer \: = - 21 - 9$

$\sf \implies \: - \bigg(21 + 9 \bigg) \: \: [ (-) \times( -) =( +) ]$

$\sf \implies \: - 30$