Вычислить 2log2 6-log2 9 и уравнение log 1/2 (1+3x)=-1

1.
2log₂6 - log₂9 = log₂6² - log₂9 = log₂36 - log₂9 = log₂36/9 = log₂4 = 2 
2.
log₁/₂ (1 + 3x) = - 1
(1/2)⁻¹ = 1 + 3x
2 = 1 + 3x
3x = 2 - 1
3x = 1
x = 1/3
ответ: 1/3