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[tex] 27^{3-x} =9
5^{x} +3* 5^{x-2} =140
3^{ x^{2-x} } \ \textless \ 9[/tex]
[tex] 27^{3-x} =9
5^{x} +3* 5^{x-2} =140
3^{ x^{2-x} } \ \textless \ 9[/tex]
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