12 15 21
8 7 26
? 41 34
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Step-by-step explanation:
Difference of 13.
34 (Row 3) - 21 (Row 1) = 13
41 (Row 3) - 15 (Row 1) = 26
Therefore...
? (Row 3) - 12 (Row 1) = 39
So, the answer is 39 + 12 = 51
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