1 answer
(click or scroll down)
To solve the equation \(31 - 9x = 4\), we first isolate \(x\).
1. Subtract 31 from both sides:
\[
-9x = 4 - 31
\]
\[
-9x = -27
\]
2. Divide both sides by -9:
\[
x = \frac{-27}{-9}
\]
\[
x = 3
\]
The solution set containing this single solution can be expressed in set notation as:
\[
\{ 3 \}
\]
So the correct answer to the question is \(\{ 3 \}\).