Final answer:
To solve the equation x - 8x - 9 = 0, combine like terms, isolate the variable, and then solve for x. The correct answer is a. x = -9/7.
Step-by-step explanation:
To solve the equation x - 8x - 9 = 0, we can simplify it by combining like terms: -7x - 9 = 0. Then, we can add 9 to both sides of the equation to isolate the variable: -7x = 9.
To solve for x, we divide both sides by -7: x = -9/7. Therefore, the correct answer is a. x = -9/7.