Вопрос:

Solve the following system of equations: 2y = x - 3 x + 4y = 1

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Ответ:

Okay, let's solve this system of equations step by step.
We have the following system:
$$\begin{cases} 2y = x - 3 \\ x + 4y = 1 \end{cases}$$
First, let's express (x) from the first equation:
$$x = 2y + 3$$
Now, substitute this expression for (x) into the second equation:
$$(2y + 3) + 4y = 1$$
Combine like terms:
$$6y + 3 = 1$$
Subtract 3 from both sides:
$$6y = 1 - 3$$
$$6y = -2$$
Divide by 6:
$$y = \frac{-2}{6} = -\frac{1}{3}$$
Now that we have the value of (y), we can find (x). Substitute (y = -\frac{1}{3}) into the expression for (x):
$$x = 2\left(-\frac{1}{3}\right) + 3$$
$$x = -\frac{2}{3} + 3$$
$$x = -\frac{2}{3} + \frac{9}{3}$$
$$x = \frac{7}{3}$$
So, the solution to the system of equations is:
$$x = \frac{7}{3}, \quad y = -\frac{1}{3}$$
Answer: (x = \frac{7}{3}, y = -\frac{1}{3})
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