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Question 3 (Multiple Choice Worth 1 points) (05.02 LC) Solve the system of equations using substitution. \( \begin{array}{l}y=-2 x+1 \\ 4 x+2 y=-2\end{array} \)

Ask by Gonzalez Wagner. in the United States
Jan 24,2025

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Tutor-Verified Answer

Answer

There is no solution to the system of equations.

Solution

Let's solve the system of equations using substitution: 1. **Given Equations:** \[ \begin{cases} y = -2x + 1 \\ 4x + 2y = -2 \end{cases} \] 2. **Substitute \( y \) from the first equation into the second equation:** \[ 4x + 2(-2x + 1) = -2 \] 3. **Simplify the equation:** \[ 4x - 4x + 2 = -2 \\ 0x + 2 = -2 \\ 2 = -2 \] 4. **Conclusion:** The equation \( 2 = -2 \) is a contradiction, meaning there is no solution to the system. **Answer:** There is no solution; the system of equations is inconsistent.

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Bonus Knowledge

To solve the system of equations using substitution, we start with the first equation: \(y = -2x + 1\). We can substitute this expression for \(y\) in the second equation, \(4x + 2y = -2\). Replacing \(y\) will yield: \(4x + 2(-2x + 1) = -2\). Simplifying this gives: \(4x - 4x + 2 = -2\), which simplifies to: \(2 = -2\). Since this is a false statement, it indicates that the system of equations is inconsistent, meaning there are no solutions. Now, let’s explore how such systems can arise! Sometimes, lines represented by these equations will never intersect, meaning they are parallel. For those tackling similar problems, double-check the equations' coefficients to identify parallel lines quickly!

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