Question
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Solve the following system of linear equations by graphing: \[ \begin{array}{r}-4 x+y=6 \\ -2 x+y=6\end{array} \]

Ask by Valdez Vaughan. in the United States
Feb 03,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The solution is \( (0, 6) \).

Solution

Solve the system of equations \( -4x+y=6;-2x+y=6 \). Solve the system of equations by following steps: - step0: Solve using the substitution method: \(\left\{ \begin{array}{l}-4x+y=6\\-2x+y=6\end{array}\right.\) - step1: Solve the equation: \(\left\{ \begin{array}{l}y=6+4x\\-2x+y=6\end{array}\right.\) - step2: Substitute the value of \(y:\) \(-2x+6+4x=6\) - step3: Add the terms: \(2x+6=6\) - step4: Move the constant to the right side: \(2x=6-6\) - step5: Subtract the terms: \(2x=0\) - step6: Rewrite the expression: \(x=0\) - step7: Substitute the value of \(x:\) \(y=6+4\times 0\) - step8: Simplify: \(y=6\) - step9: Calculate: \(\left\{ \begin{array}{l}x=0\\y=6\end{array}\right.\) - step10: Check the solution: \(\left\{ \begin{array}{l}x=0\\y=6\end{array}\right.\) - step11: Rewrite: \(\left(x,y\right) = \left(0,6\right)\) The solution to the system of linear equations by graphing is \( (x, y) = (0, 6) \).

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The Deep Dive

To solve the system of equations by graphing, let's first rearrange each equation into slope-intercept form (y = mx + b). 1. For the first equation, \(-4x + y = 6\): \[ y = 4x + 6 \] 2. For the second equation, \(-2x + y = 6\): \[ y = 2x + 6 \] Now, let's plot both equations on the same graph. - The first equation \(y = 4x + 6\) has a y-intercept of 6; when \(x = 0\), \(y = 6\). To find another point, let \(x = -1\): \[ y = 4(-1) + 6 = 2 \] So the points (0, 6) and (-1, 2) can be marked. - The second equation \(y = 2x + 6\) also has a y-intercept of 6. When \(x = 0\), \(y = 6\). Let's find another point by letting \(x = -2\): \[ y = 2(-2) + 6 = 2 \] So the points (0, 6) and (-2, 2) can be marked. When you graph these lines, they both intersect at the point (0, 6). Thus, the solution to the system of equations is: \(x = 0\) and \(y = 6\), or simply the point \((0, 6)\).

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