The answer:
3 + 6 = 21
8 + 11 = x
Addind both side of ecuations:
28 = 21 + x => x =7
The answer is 7, so
3 + 6 = 21
8 + 11 = 7
28 = 28
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The answer:
3 + 6 = 21
8 + 11 = x
Addind both side of ecuations:
28 = 21 + x => x =7
The answer is 7, so
3 + 6 = 21
8 + 11 = 7
28 = 28