Solve a x - 12 = 9.

Question

A. x = - 21/a
B. x = - 3/a
C. x = 21/a
D. x = 3/a

Answer 1

To solve the equation \( ax - 12 = 9 \), follow these steps:

1. Add 12 to both sides: \[ ax - 12 + 12 = 9 + 12 \] \[ ax = 21 \]

2. Divide both sides by \( a \): \[ x = \frac{21}{a} \]

Thus, the correct answer is: C. \( x = \frac{21}{a} \).

Answer 2

are you positive this is correct

Answer 3

Yes, let's double-check the solution step by step to ensure it's correct.

Given the equation:

\[ ax - 12 = 9 \]

1. Add 12 to both sides: \[ ax = 9 + 12 \] \[ ax = 21 \]

2. Divide both sides by \( a \) (assuming \( a \neq 0 \)): \[ x = \frac{21}{a} \]

So, the solution to the equation is indeed:

\[ x = \frac{21}{a} \]

Conclusion: The answer is C. \( x = \frac{21}{a} \).