Ответ:
(12, 4)
Объяснение:
10x-9y=844x-3y=60x=12 y=45*12/3 - 3*4/2 = 142*12/3 + 4/2 = 10
Решение.
[tex]\bf \left\{\begin{array}{l}\bf \dfrac{5x}{3}-\dfrac{3y}{2}=14\ |\cdot 6\\\bf \dfrac{2x}{3}+\dfrac{y}{2}=10\ |\cdot 6\end{array}\right[/tex]
Умножим оба уравнения на 6.
[tex]\left\{\begin{array}{l}\bf 10x-9y=84\\\bf 4x+3y=60\ |\cdot 3\end{array}\right\ +\ \left\{\begin{array}{l}\bf 10x-9y=84\\\bf 22x=264\end{array}\right\ \ \left\{\begin{array}{l}\bf 9y=10x-84\\\bf x=12\end{array}\right\\\\\\ \left\{\begin{array}{l}\bf 9y=36\\\bf x=12\end{array}\right\ \ \left\{\begin{array}{l}\bf y=4\\\bf x=12\end{array}\right[/tex]
Ответ: [tex]\bf (\, 12\ ;\ 4\ )\ .[/tex]
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Answers & Comments
Ответ:
(12, 4)
Объяснение:
10x-9y=84
4x-3y=60
x=12 y=4
5*12/3 - 3*4/2 = 14
2*12/3 + 4/2 = 10
Решение.
[tex]\bf \left\{\begin{array}{l}\bf \dfrac{5x}{3}-\dfrac{3y}{2}=14\ |\cdot 6\\\bf \dfrac{2x}{3}+\dfrac{y}{2}=10\ |\cdot 6\end{array}\right[/tex]
Умножим оба уравнения на 6.
[tex]\left\{\begin{array}{l}\bf 10x-9y=84\\\bf 4x+3y=60\ |\cdot 3\end{array}\right\ +\ \left\{\begin{array}{l}\bf 10x-9y=84\\\bf 22x=264\end{array}\right\ \ \left\{\begin{array}{l}\bf 9y=10x-84\\\bf x=12\end{array}\right\\\\\\ \left\{\begin{array}{l}\bf 9y=36\\\bf x=12\end{array}\right\ \ \left\{\begin{array}{l}\bf y=4\\\bf x=12\end{array}\right[/tex]
Ответ: [tex]\bf (\, 12\ ;\ 4\ )\ .[/tex]