# Answer to Question #11302 in Other Math for CRYSTAL

Question #11302

8-9-2; 12-7-4; 21-4-_? FIND THE MISSING NUMBER

Expert's answer

9+2=11

7+4=11

4+x=11

x=7

21-4-7

7+4=11

4+x=11

x=7

21-4-7

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