Giải hệ pt \(\left\{{}\begin{matrix}\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{3}{20}\\x-y=3\end{matrix}\right.\)

Giải hệ pt: \(\left\{{}\begin{matrix}2mx+y=2\\8x+my=m+2\end{matrix}\right.\)

Tìm x,y : \(\left\{{}\begin{matrix}\sqrt{x}-2=2\\\sqrt{y}-1=2\end{matrix}\right.\)

Giải hệ pt: \(\left\{{}\begin{matrix}-18x-14y=-25\\66x-66y=33\end{matrix}\right.\)

Giải hệ pt: \(\left\{{}\begin{matrix}\dfrac{x-5y}{4}-\dfrac{3x-2y}{3}=\dfrac{-25}{24}\\\dfrac{5x+3y}{8}+\dfrac{x-6y}{5}=\dfrac{33}{80}\end{matrix}\right.\)

Giải hệ pt: \(\left\{{}\begin{matrix}3\left(x-y\right)-5\left(x+2y\right)=99\\x-3y=7x-4y-17\end{matrix}\right.\)