Toán tính x y ✓x – 3 = 7 3x – 4y = 5 + 3y help me 07/09/2021 By Amaya tính x y ✓x – 3 = 7 3x – 4y = 5 + 3y help me
$\left\{\begin{matrix}\sqrt{x}-3=7\\ 3x-4y=5+3y\end{matrix}\right.\\\Leftrightarrow \sqrt{x}-3=7\\\Leftrightarrow x=100\\\Leftrightarrow 3.100-4y=5+3y\\\Leftrightarrow y=\dfrac{295}{7}$Vậy $(x,y)=\left ( 100,\dfrac{295}{7} \right )$ Trả lời
@ Don’t worry, the right ones won’t leave.
$\left\{\begin{matrix}
\sqrt{x}-3=7\\
3x-4y=5+3y
\end{matrix}\right.\\\Leftrightarrow \sqrt{x}-3=7\\\Leftrightarrow x=100\\\Leftrightarrow 3.100-4y=5+3y\\\Leftrightarrow y=\dfrac{295}{7}$
Vậy $(x,y)=\left ( 100,\dfrac{295}{7} \right )$