Question

question
solve the system by substitution.
$x = y$
$-3x - y = 4$
answer attempt 1 out of 2
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Explanation:

Step1: Substitute $x=y$ into the second equation

$$\begin{align*} -3y - y &= 4 \end{align*}$$

Step2: Combine like terms

$$\begin{align*} -4y &= 4 \end{align*}$$

Step3: Solve for $y$

$$\begin{align*} y &= \frac{4}{-4} = -1 \end{align*}$$

Step4: Find $x$ using $x=y$

$$\begin{align*} x &= -1 \end{align*}$$

Answer:

$(-1, -1)$