QUESTION IMAGE
Question
graph the system below and write its solution.\
$$\begin{cases}-2x + y = -4 \\\\ y = \\dfrac{1}{3}x + 1\\end{cases}$$
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note that you can also answer
o solution\ or \infinitely many\ solutions.\
solution: \square
Step1: Rewrite first equation to slope-intercept
$y=2x-4$
Step2: Set equations equal to each other
$2x-4=\frac{1}{3}x+1$
Step3: Solve for x
Multiply all terms by 3: $6x-12=x+3$
Subtract $x$: $5x-12=3$
Add 12: $5x=15$
Divide by 5: $x=3$
Step4: Find y with x=3
$y=2(3)-4=6-4=2$
Step5: Verify with second equation
$y=\frac{1}{3}(3)+1=1+1=2$
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$(3, 2)$
To graph:
- For $y=2x-4$: plot y-intercept $(0,-4)$, use slope 2 to plot $(1,-2)$, draw the line.
- For $y=\frac{1}{3}x+1$: plot y-intercept $(0,1)$, use slope $\frac{1}{3}$ to plot $(3,2)$, draw the line.
The lines intersect at $(3,2)$.