Question
Solving Systems of Equations by Graphing Solve each swstem by graphing. \( \begin{array}{ll}\text { 1) } y=-\frac{5}{3} x+3-\frac{6}{3} x+3=\frac{1}{3} x-3 & \text { 2) } y=4 x+3 \\ y=\frac{1}{3} x-3 & x=1\end{array} \)
Ask by Gordon Gordon. in the United States
Feb 25,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The solutions are:
1. \( (0, 3) \)
2. \( (1, 7) \)
Solution
Solve the system of equations by following steps:
- step0: Solve using the substitution method:
\(\left\{ \begin{array}{l}y=4x+3\\x=1\end{array}\right.\)
- step1: Substitute the value of \(x:\)
\(y=4\times 1+3\)
- step2: Simplify:
\(y=7\)
- step3: Calculate:
\(\left\{ \begin{array}{l}x=1\\y=7\end{array}\right.\)
- step4: Check the solution:
\(\left\{ \begin{array}{l}x=1\\y=7\end{array}\right.\)
- step5: Rewrite:
\(\left(x,y\right) = \left(1,7\right)\)
Solve the system of equations \( y=-\frac{5}{3} x+3; y=-\frac{1}{3} x+3 \).
Solve the system of equations by following steps:
- step0: Solve using the substitution method:
\(\left\{ \begin{array}{l}y=-\frac{5}{3}x+3\\y=-\frac{1}{3}x+3\end{array}\right.\)
- step1: Substitute the value of \(y:\)
\(-\frac{5}{3}x+3=-\frac{1}{3}x+3\)
- step2: Cancel equal terms:
\(-\frac{5}{3}x=-\frac{1}{3}x\)
- step3: Add or subtract both sides:
\(-\frac{5}{3}x-\left(-\frac{1}{3}x\right)=0\)
- step4: Subtract the terms:
\(-\frac{4}{3}x=0\)
- step5: Change the signs:
\(\frac{4}{3}x=0\)
- step6: Rewrite the expression:
\(x=0\)
- step7: Substitute the value of \(x:\)
\(y=-\frac{5}{3}\times 0+3\)
- step8: Substitute back:
\(y=3\)
- step9: Calculate:
\(\left\{ \begin{array}{l}x=0\\y=3\end{array}\right.\)
- step10: Check the solution:
\(\left\{ \begin{array}{l}x=0\\y=3\end{array}\right.\)
- step11: Rewrite:
\(\left(x,y\right) = \left(0,3\right)\)
Let's solve the systems of equations step by step by graphing.
### System 1:
The equations are:
1. \( y = -\frac{5}{3} x + 3 \)
2. \( y = -\frac{1}{3} x + 3 \)
To find the intersection point, we can set the two equations equal to each other:
\[
-\frac{5}{3} x + 3 = -\frac{1}{3} x + 3
\]
By simplifying, we can see that both equations intersect at the point where \( x = 0 \). Substituting \( x = 0 \) into either equation gives:
\[
y = -\frac{5}{3}(0) + 3 = 3
\]
Thus, the solution for the first system is:
\[
(x, y) = (0, 3)
\]
### System 2:
The equations are:
1. \( y = 4x + 3 \)
2. \( x = 1 \)
Since the second equation is a vertical line at \( x = 1 \), we can substitute \( x = 1 \) into the first equation to find \( y \):
\[
y = 4(1) + 3 = 4 + 3 = 7
\]
Thus, the solution for the second system is:
\[
(x, y) = (1, 7)
\]
### Summary of Solutions:
1. For the first system: \( (x, y) = (0, 3) \)
2. For the second system: \( (x, y) = (1, 7) \)
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Extra Insights
To solve the first system by graphing, let's rearrange the equations. The first equation simplifies to \( y = -\frac{5}{3}x + 1 \), and the second equation is already in slope-intercept form. Now, plot both lines on a graph. The intersection point of both lines will give you the solution to the system. For the second system, we have the linear equation \( y = 4x + 3 \) and a vertical line \( x = 1 \). Substitute \( x = 1 \) into the first equation to find \( y = 4(1) + 3 = 7 \). Therefore, the solution is the point (1, 7).