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1) \( \left\{\begin{array}{c}3 x-2 y=-2 \\ 4 y-4=6 x\end{array}\right. \)

Ask by Murphy Pollard. in Kazakhstan
Feb 13,2025

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Система уравнений имеет бесконечно много решений. Любое значение y позволяет найти соответствующее x по формуле x = (2y – 2)/3.

Solution

Рассмотрим систему уравнений:   1) 3x – 2y = –2   2) 4y – 4 = 6x Шаг 1. Выразим x через y из первого уравнения:   3x = 2y – 2   x = (2y – 2) / 3 Шаг 2. Подставим полученное выражение для x во второе уравнение:   4y – 4 = 6 · ((2y – 2) / 3)   4y – 4 = 2(2y – 2)   4y – 4 = 4y – 4 Полученное равенство является тождеством, то есть верно при любом значении y. Вывод: система эквивалентна одному уравнению, а следовательно, имеет бесконечно много решений. Общее решение можно записать в виде:   x = (2y – 2) / 3, где y ∈ ℝ. Или, обозначив параметр, например, t ∈ ℝ:   x = (2t – 2) / 3   y = t Таким образом, решение системы: Любая пара (x, y), удовлетворяющая условию x = (2y – 2)/3, является решением системы.

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To solve the system of equations, let's first rewrite the second equation in a standard form: \( 4y = 6x + 4 \). Therefore, we can simplify it to \( y = \frac{3}{2}x + 1 \). Now substitute \( y \) in the first equation: \( 3x - 2\left(\frac{3}{2}x + 1\right) = -2 \). This will lead to simplifying and solving for \( x \). Once you find \( x \), substitute it back into the equation for \( y \). Now, let's be on the lookout for common mistakes! A frequent one is forgetting to distribute coefficients correctly or misaligning terms during substitution, which can lead to simple arithmetic errors. Always double-check your calculations to ensure you didn't miss a negative sign or a multiplication!

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