Question
Solve the equation. (Enter your answers as a comma-separated list.) \[ |2 x+3|-7=9 \] \( x=\square \)
Ask by Daniel Stewart. in the United States
Mar 10,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
\( x=-\frac{19}{2}, \frac{13}{2} \)
Solution
Solve the equation \( |2x+3|-7=9 \).
Solve the equation by following steps:
- step0: Solve for \(x\):
\(\left|2x+3\right|-7=9\)
- step1: Move the constant to the right side:
\(\left|2x+3\right|=9+7\)
- step2: Add the numbers:
\(\left|2x+3\right|=16\)
- step3: Separate into possible cases:
\(\begin{align}&2x+3=16\\&2x+3=-16\end{align}\)
- step4: Solve the equation:
\(\begin{align}&x=\frac{13}{2}\\&x=-\frac{19}{2}\end{align}\)
- step5: Rewrite:
\(x_{1}=-\frac{19}{2},x_{2}=\frac{13}{2}\)
The solutions to the equation \(|2x+3|-7=9\) are \(x=-\frac{19}{2}\) and \(x=\frac{13}{2}\).
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Extra Insights
To solve the equation \( |2x + 3| - 7 = 9 \), first, isolate the absolute value: \[ |2x + 3| = 9 + 7 \] \[ |2x + 3| = 16 \] This gives us two separate cases to consider: 1. \( 2x + 3 = 16 \) \[ 2x = 16 - 3 \] \[ 2x = 13 \] \[ x = \frac{13}{2} = 6.5 \] 2. \( 2x + 3 = -16 \) \[ 2x = -16 - 3 \] \[ 2x = -19 \] \[ x = \frac{-19}{2} = -9.5 \] So the solutions to the equation are: \( x = 6.5, -9.5 \)