\(\Leftrightarrow\left\{{}\begin{matrix}10x+50y-30z=360\\10x+20y+20z=195\\10x-2y-2z=80\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x+5y-3z=36\\30y-50z=165\\52y-28z=280\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=\dfrac{469}{88}\\z=-\dfrac{9}{88}\\x=\dfrac{199}{22}\end{matrix}\right.\)
Giải hệ phương trình :
a, \(\left\{{}\begin{matrix}\left(x+y-2\right)\left(2x-y\right)=0\\x^2+y^2=2\end{matrix}\right.\)
b, \(\left\{{}\begin{matrix}x^2+y^2+2x+2y=6\\x+y-3xy+1=0\end{matrix}\right.\)
c,\(\left\{{}\begin{matrix}x^2+4x=5y\\y^2+4y=5x\end{matrix}\right.\)
d,\(\left\{{}\begin{matrix}x^2+2y^2+xy=4\\2x^2+xy+3y^2=6\end{matrix}\right.\)
e,\(\left\{{}\begin{matrix}4x^2+8x=5y\\y^2+4y=10x\end{matrix}\right.\)
Bài 1: Giải hệ phương trình sau:
a) \(\left\{{}\begin{matrix}3x+2y=-2\\-x+4y=3\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}x+2y=11\\5x-3y=3\end{matrix}\right.\)
c) \(\left\{{}\begin{matrix}10x-9y=1\\15x+21y=36\end{matrix}\right.\)
d) \(\left\{{}\begin{matrix}2x+y=2\\x+y=2\end{matrix}\right.\)
Giải phương trình:
1. \(\left\{{}\begin{matrix}4x-2y=3\\6x-3y=5\end{matrix}\right.\)
2. \(\left\{{}\begin{matrix}2x-3y=5\\4x+6y=10\end{matrix}\right.\)
3. \(\left\{{}\begin{matrix}3x-4y+2=0\\5x+2y=14\end{matrix}\right.\)
4. \(\left\{{}\begin{matrix}2x+5y=3\\3x-2y=14\end{matrix}\right.\)
Các hệ phương trình có nghiệm không
a\(\left\{{}\begin{matrix}5x-4y=1\\3x+1=13\\7x-5y=1\end{matrix}\right.\)
b\(\left\{{}\begin{matrix}11x+3y=-1\\2x+y=3\\5x+2y=4\end{matrix}\right.\)
bài 1
a)\(\left\{{}\begin{matrix}-x+3y=10\\x-5y=16\end{matrix}\right.\)
b)\(\left\{{}\begin{matrix}2x+y=7\\-x+4y=10\end{matrix}\right.\)
c)\(\left\{{}\begin{matrix}3x-5y=-18\\x+2y=5\end{matrix}\right.\)
Giải hệ phương trình:
\(\left\{{}\begin{matrix}4x+4y=64\\-2x+5y=10\end{matrix}\right.\)
Giải hệ pt\(\left\{{}\begin{matrix}2x^2-xy+5y^2=6\\3x^2+2xy-4y^21\end{matrix}\right.\)
Hpt tương đương với hpt\(\left\{{}\begin{matrix}2x-5y=5\\2x+3y=5\end{matrix}\right.\)là:
A,\(\left\{{}\begin{matrix}2x-5y=5\\4x+8y=10\end{matrix}\right.\) B,\(\left\{{}\begin{matrix}2x-5y=5\\0x-2y=0\end{matrix}\right.\) C,\(\left\{{}\begin{matrix}2x-5y=5\\2x-8y=10\end{matrix}\right.\) D,\(\left\{{}\begin{matrix}\frac{2}{5}x-y=1\\\frac{2}{3}x+y=\frac{5}{3}\end{matrix}\right.\)
Giải thích hộ mk nha
Giai hệ phương trình:\(\left\{{}\begin{matrix}\left|x+2\right|+\left|y-3\right|=8\\\left|x+2\right|-5y=1\end{matrix}\right.\)
