Final answer:
The sum of 3 and twice a number is 15 leads to the equation 3 + 2x = 15. Solving for x gives x = 6, and then multiplying by 8 gives 8x = 48, which is not listed in the options provided.
Step-by-step explanation:
The question involves solving a simple linear equation to find the value of a variable and then multiplying that variable by 8 to get the required answer.
First, let's set up the equation based on the statement: If the sum of 3 and twice a number is 15, we have the equation 3 + 2x = 15. To find the value of 'x', we subtract 3 from both sides of the equation, which gives us 2x = 12. Dividing both sides by 2, we find that x = 6.
Now, we need to calculate 8x. Since we found that x = 6, we multiply 6 by 8 to get 48. Therefore, the value of 8x is 48, which is not listed in the given options, indicating that there may be an error in the question or the provided choices.