Question

Solve ax−12=9 .(1 point)
Responses

x=21a
x equals Start Fraction 21 over a End Fraction

x=−3a
x equals negative Start Fraction 3 over a End Fraction

x=−21a
x Equals negative Start Fraction 21 over a End Fraction

x=3a

Answer 1

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

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

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

Thus, the solution is:
\[
x = \frac{21}{a}
\]

The correct response is:
**x equals Start Fraction 21 over a End Fraction**.