3 years ago

-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:

Step-by-step explanation:

let X = ( )

-12 + X = 9

X = 9 + 12

X = 21

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