Question

Solve log4 (y - 9) + log4 3 = log4 81
Choose one answer.
a. y = 30
b. y = 36
c. y = 87
d. y = 108

Answer 1

3(y-9) = 81
y = 36

Answer 2

I think you mean log 3 (....), right? In that case, y = 36.

Answer 3

kk thanks!