Answer :
Answer:
If the equation is the first one then none of those answers are correct but the second one do have a correct answer (B)
x = - 1
Step-by-step explanation:
*Look at the picture *


Answer:
Step-by-step explanation:
The given expression is
8 = 2^x + 4
The first step is to subtract 4 from the left hand side and the right hand side of the equation. It becomes
8 - 4 = 2^x + 4 - 4
4 = 2^x
The next step is to express 4 on the left hand side of the equation in powers of 2. It becomes
2^2 = 2^x
Since the two bases on the left hand side and the right hand side of the equation are equal, then the powers can be equated. Therefore
x = 2