Final answer:
The value of x that makes the equation 6a + 14 = -7 - a true is found by solving for a. By performing algebraic operations, we find that a = -3, which corresponds to answer choice D) x = -3.
Step-by-step explanation:
To find the value of x that makes the equation 6a + 14 = -7 - a true, we need to solve for a first. Here are the steps to solve the equation:
- Add a to both sides of the equation to get: 7a + 14 = -7.
- Subtract 14 from both sides to obtain: 7a = -21.
- Divide both sides by 7 to find the value of a: a = -3.
If a = -3, and looking at the provided choices, the answer would be D) x = -3.