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Mathematics

Solve the following equation:

log105 + log10(5x + 1) = log10(x + 5) + 1

Logarithms

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Answer

Given,

⇒ log105 + log10(5x + 1) = log10(x + 5) + 1

⇒ log105(5x + 1) = log10(x + 5) + log1010

⇒ log10(25x + 5) = log1010(x + 5)

⇒ log10(25x + 5) = log10(10x + 50)

⇒ 25x + 5 = 10x + 50

⇒ 25x - 10x = 50 - 5

⇒ 15x = 45

⇒ x = 3.

Hence, x = 3.

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