г) log₁/₂ (x + 9) – log₁/₂ (8 – 3x) = 2.

log₁/₂ (x + 9) – log₁/₂ (8 – 3x) = 2

log₁/₂ ((x + 9) / (8 – 3x)) = 2

(x + 9) / (8 – 3x) = (1/2)²

(x + 9) / (8 – 3x) = 1/4

x + 9 = 1/4 (8 - 3x)

x + 9 = 2 - 3/4 x

1 3/4 x = -7

7/4 x = -7

x = -4

Ответ: -4