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wlad13 [49]
3 years ago
14

-12 + ( ) = 9 whats the missing number

Mathematics
2 answers:
PilotLPTM [1.2K]3 years ago
7 0

Answer:

The missing number is 21

Step-by-step explanation:

-12 + x = 9

x = 9 + 12

x = 21

erastovalidia [21]3 years ago
3 0

Answer:

21

Step-by-step explanation:

let X = ( )

-12 + X = 9

X = 9 + 12

X = 21

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