Solve Other Linear Equations Quick Check

Question

4 of 54 of 5 Items
Question
Solve ax−12=9 .(1 point)
Responses

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

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

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

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

Answer 1

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

1. Add 12 to both sides to isolate the term with \( x \):

\[ ax - 12 + 12 = 9 + 12 \]

\[ ax = 21 \]

2. Now, divide both sides by \( a \) to solve for \( x \):

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

Thus, the correct answer is:

x equals Start Fraction 21 over a End Fraction.