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\( \begin{array}{l}2 x+3 y=6 \\ 5 x+2 y=4\end{array} \) Which of the following equations could be the result of multiplication and addition to eliminate a variable in the system of equations? \( \begin{array}{l}19 x=24 \\ 11 y=22\end{array} \)

Ask by Turner Lyons. in the United States
Feb 27,2025

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Answer

Neither \( 19x = 24 \) nor \( 11y = 22 \) can be derived from the original system of equations by multiplying and adding to eliminate a variable.

Solution

Solve the system of equations by following steps: - step0: Solution: \(\left\{ \begin{array}{l}19x=24\\11y=22\end{array}\right.\) - step1: Calculate: \(\left\{ \begin{array}{l}x=\frac{24}{19}\\y=2\end{array}\right.\) - step2: Check the solution: \(\left\{ \begin{array}{l}x=\frac{24}{19}\\y=2\end{array}\right.\) - step3: Rewrite: \(\left(x,y\right) = \left(\frac{24}{19},2\right)\) Solve the system of equations \( 2 x + 3 y = 6; 5 x + 2 y = 4 \). Solve the system of equations by following steps: - step0: Solve using the substitution method: \(\left\{ \begin{array}{l}2x+3y=6\\5x+2y=4\end{array}\right.\) - step1: Solve the equation: \(\left\{ \begin{array}{l}x=\frac{6-3y}{2}\\5x+2y=4\end{array}\right.\) - step2: Substitute the value of \(x:\) \(5\times \frac{6-3y}{2}+2y=4\) - step3: Simplify: \(\frac{5\left(6-3y\right)}{2}+2y=4\) - step4: Multiply both sides of the equation by LCD: \(\left(\frac{5\left(6-3y\right)}{2}+2y\right)\times 2=4\times 2\) - step5: Simplify the equation: \(30-11y=8\) - step6: Move the constant to the right side: \(-11y=8-30\) - step7: Subtract the numbers: \(-11y=-22\) - step8: Change the signs: \(11y=22\) - step9: Divide both sides: \(\frac{11y}{11}=\frac{22}{11}\) - step10: Divide the numbers: \(y=2\) - step11: Substitute the value of \(y:\) \(x=\frac{6-3\times 2}{2}\) - step12: Calculate: \(x=0\) - step13: Calculate: \(\left\{ \begin{array}{l}x=0\\y=2\end{array}\right.\) - step14: Check the solution: \(\left\{ \begin{array}{l}x=0\\y=2\end{array}\right.\) - step15: Rewrite: \(\left(x,y\right) = \left(0,2\right)\) To determine which of the given equations could result from multiplication and addition to eliminate a variable in the system of equations, we first need to solve the original system of equations: 1. **Original System of Equations:** \[ \begin{array}{l} 2x + 3y = 6 \\ 5x + 2y = 4 \end{array} \] Solving this system, we find: \[ (x, y) = (0, 2) \] 2. **Given Equations:** \[ \begin{array}{l} 19x = 24 \\ 11y = 22 \end{array} \] Solving these equations, we find: \[ (x, y) = \left(\frac{24}{19}, 2\right) \] 3. **Analysis of Results:** - The solution to the original system is \( (0, 2) \). - The solution to the given equations is \( \left(\frac{24}{19}, 2\right) \). Since both systems yield different values for \( x \) (0 vs. \(\frac{24}{19}\)), we can conclude that neither of the given equations \( 19x = 24 \) or \( 11y = 22 \) can be derived from the original system through multiplication and addition to eliminate a variable. Thus, the answer is that neither equation could be the result of the operations on the original system.

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Extra Insights

To eliminate a variable in the given system of equations, you can manipulate both equations through multiplication and addition. Multiplying the first equation by 5 gives you \(10x + 15y = 30\), and multiplying the second equation by 2 results in \(10x + 4y = 8\). Subtracting these results leads to a new equation in terms of \(y\). If you look closely at the outcome of combining equations correctly, indeed \(19x=24\) could be a plausible outcome if derived from different manipulations and combinations of coefficients. However, note that \(11y=22\) simplifies to \(y=2\), which shows the value of one variable significantly if found — hence, each approach can bear varying routes to reveal valid solutions! For those looking into solving linearly independent equations, it's worth exploring methods like substitution and elimination further! Engaging with practices exemplifying real-world scenarios can enhance understanding, like optimizing delivery routes using systems of equations!

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