Solve ax−12=9.(1 point) Responses x=3a x equals Start Fraction 3 over a End Fraction x=−3a x equals negative Start Fraction 3 over a End Fraction x=21a x equals Start Fraction 21 over a End Fraction x=−21a

Answer 1

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

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

2. To isolate \( x \), divide both sides by \( a \): \[ x = \frac{21}{a} \]

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

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