The answer to your question is A
Answer:
log_a(b) - log_a(c) = log_a(\frac{b}{c})
Using that formula we get:
log_6(60) - log_6(30) = log_6(2)
For this case we have that by definition, a function is of the form:

So, we have the following system of equations:

Equating the equations we have:

Adding 2x to both sides of the equation:

Subtracting 2 from both sides of the equation:

Dividing between -4 on both sides of the equation:

Thus, the value of the variable "x" is -0.5.
Answer:
-0.5