Question

what should be subtracted from (-3) to get +18 ?​

Answer 1

Required Answer ✅

: The required answer is 21

21 - 3 = 18

Answer 2

Let the unknown number be x

$- 3 - x = 18 \\ x = - 3 - 18 \\ x = - 21$

- 21 should be subtracted from -3 to get 18

Verification :

$- 3 - ( - 21) = 18 \\ - 3 + 21 = 18 \\ 18 = 18$