giải hệ PT sau
\(\left\{{}\begin{matrix}x+2y=1\\-3x-y=-2\end{matrix}\right.\)
\(\left\{{}\begin{matrix}4x-5y=9\\7x+y=6\end{matrix}\right.\)
\(\left\{{}\begin{matrix}8x+2y=13\\x+y=1\end{matrix}\right.\)
\(\left\{{}\begin{matrix}5x-3y=1\\2x+y=7\end{matrix}\right.\)
Giải hệ pt:
a)\(\left\{{}\begin{matrix}x-\left(1+\sqrt{3}\right)y=1\\\left(1-\sqrt{3}\right)x+y=1\end{matrix}\right.\)
b)\(\left\{{}\begin{matrix}-x-\sqrt{2}y=\sqrt{3}\\\sqrt{2}x+2y=-\sqrt{6}\end{matrix}\right.\)
giải hệ pt bằng phương pháp thế:
a,\(\left\{{}\begin{matrix}3x+y=-2\\-9x-39=6\end{matrix}\right.\)
b,\(\left\{{}\begin{matrix}x+y=101\\-x+y=-1\end{matrix}\right.\)
c,\(\left\{{}\begin{matrix}x+y=2\\\dfrac{1}{2}x+y=\dfrac{5}{4}\end{matrix}\right.\)
d,\(\left\{{}\begin{matrix}x-5y=16\\10y-2x=-32\end{matrix}\right.\)
Giải hệ phương trình sau bằng phương pháp thế
1) \(\left\{{}\begin{matrix}x-2y=4\\-2x+5y=-3\end{matrix}\right.\)
2) \(\left\{{}\begin{matrix}2x+y=10\\5x-3y=3\end{matrix}\right.\)
3) \(\left\{{}\begin{matrix}x+2y=4\\-3x+y=7\end{matrix}\right.\)
Giải hệ phương trình
a)\(\left\{{}\begin{matrix}6x^2-3xy+x=1-y\\x^2+y^2=1\end{matrix}\right.\) c)\(\left\{{}\begin{matrix}\left|x+1\right|+\left|y-1\right|=5\\\left|x+1\right|-4y+4=0\end{matrix}\right.\)
b)\(\left\{{}\begin{matrix}2x^2-2x+xy-y=0\\x^2-3xy+4=0\end{matrix}\right.\)
Giải hệ pt:
\(\left\{{}\begin{matrix}\left|x-1\right|+\left|y+2\right|=2\\4\left|x-1\right|+3\left|y+2\right|=7\end{matrix}\right.\)
Giải hệ pt:
\(\left\{{}\begin{matrix}\left(x-1\right)\left(y+3\right)=xy+27\\\left(x-2\right)\left(y+1\right)=xy+8\end{matrix}\right.\)
Giải các hệ phương trình sau bằng phương pháp thế:
a\(\left\{{}\begin{matrix}x+3y=4\\4x=5y=18\end{matrix}\right.\)
b\(\left\{{}\begin{matrix}5x-3y=5\\2x+5y=33\end{matrix}\right.\)
c\(\left\{{}\begin{matrix}\frac{x}{2}-\frac{y}{3}=0\\5x+y=13\end{matrix}\right.\)
d\(\left\{{}\begin{matrix}x+2y=\frac{7}{6}\\4x+6y=4\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\sqrt{3}x-y=1\\x+y=\sqrt{3}\end{matrix}\right.\)
giải hệ PT