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Mathematics

Solve for x:

9 × 3x = (27)2x - 5

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Answer

Given,

⇒ 9 × 3x = (27)2x - 5

⇒ 32 × 3x = (33)(2x - 5)

⇒ 3(x + 2) = 3(6x - 15)

Equating the exponents,

⇒ x + 2 = 6x - 15

⇒ 6x - x = 15 + 2

⇒ 5x = 17

⇒ x = 175=325\dfrac{17}{5} = 3\dfrac{2}{5}.

Hence, x = 3253\dfrac{2}{5}.

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