The answer is 42.
14 + 7 = 21
21 x 2 = 42
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The numbers are 14 and 7 because 14+7 = 21 and 14-7 = 7
2*(-7) = -14
The sum of -14 and 11 is -3. The quotient of -21 and -3 is 7. It looks like the answer to your question is 7.
The answer is 7. The equation is x+14=21, so you would find x by doing 21-14=7 x=7
John=14 Enrico=7 14+7=21 :)