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Solve a x - 12 = 9.

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

3 answers

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

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

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

So the correct answer is: A. \( x = \frac{21}{a} \).

are you positive this is correct

Yes, I'm confident that the solution is correct. Let's go through it again step by step.

You provided the equation:

\[ ax - 12 = 9 \]

  1. First, add 12 to both sides to isolate the term with \( x \): \[ ax = 9 + 12 \] \[ ax = 21 \]

  2. Next, divide both sides by \( a \) to solve for \( x \): \[ x = \frac{21}{a} \]

So the final answer is indeed \( x = \frac{21}{a} \). Therefore, the answer is:

A. \( x = \frac{21}{a} \).

If you have any further questions or need clarification on any steps, feel free to ask!