Question

-15
-3
3
15
Pls help idk this

Answer 1

-3

Explanation:

see attached

Answer 2

-3

Explanation:

4^x = (1/8)^(x+5)

(2^2)^x = (2^-3)^(x+5)

2^2x = 2^(-3x - 15)

Since both sides have the same base of 2, then the exponents are equal

So

2x = - 3x - 15

5x = -15

x = -3