Algebra & Equations · Question 29 · Hard
If 2^(x + 1) + 2^x = 48, what is the value of x?
- 4
- 5
- 6
- 3
Answer and explanation
Answer: A. 4
Explanation: 2^(x + 1) + 2^x = 2·2^x + 2^x = 3·2^x = 48, so 2^x = 16 and x = 4.
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