Question

Sum of two integers is - 21 so 1st is -10 so what is other number

Answer 1

please refer to the attachment


Hope it will help you

Answer 2

let the two integers be x and y

x + y = - 21

but , one integer i. e. - 10

-10 + y = -21

y = -21 + 10

y = - 11

so another number is -11