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The number of people used first search engine is $\"\"$ .

The number of people used second search engine is $\"\"$ .

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Rewrite the above equation.

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Apply one-to-one property of exponential function is : $\"\"$ if and only if $\"\"$ .

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In $\"\"$ week same number of people use each search engine.

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In $\"\"$ week same number of people use each search engine.