Question

Please solve it it is very impoptant ​

Answer 1

Answer:

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Answer 2

Right answer is 6.

$(12 by \: 13) ^{4} \times (13by12) ^{ - 8} = (12by13) ^{2x} \\ (12by13) ^{4} \times (12by13) ^{8} = (12by13) ^{2x} \\ (12by13) ^{4 + 8} = (12by13) }^{2x) \\ 4 + 8 = 2x \\ 2x = 12 = 12by2 = 6$

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