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Solve using substitution. \( \begin{array}{l}y=-1 \\ -x-2 y=4\end{array} \)

Ask by Murray Wang. in the United States
Jan 24,2025

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\( (x,y) = (-2,-1) \)

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To solve this system using substitution, we already have \(y = -1\). Now, we can substitute \(y\) into the second equation \(-x - 2y = 4\). Substituting \(y\): \(-x - 2(-1) = 4\) \(-x + 2 = 4\) Now, subtract 2 from both sides: \(-x = 2\) Multiply by -1: \(x = -2\) So, the solution to the system is \(x = -2\) and \(y = -1\). Thus, the ordered pair is \((-2, -1)\)! 😊

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