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_30. Solve the following logarithmic equation: log8(x + 9) + 3 = 3

A) x = -8
B) x = 87
C) x = 12.5
D) x = 0
=

User Hemisphire
by
3.9k points

1 Answer

10 votes

Answer:

A

Explanation:

using the rule of logarithms


log_(b) x = n ⇒ x =
b^(n)


log_(8) (x + 9) + 3 = 3 ( subtract 3 from both sides )


log_(8) (x + 9) = 0 , then

x + 9 =
8^(0) = 1 ( subtract 9 from both sides )

x = - 8

User Thusi
by
4.0k points