Bài 1: Phương trình bậc nhất hai ẩn
Các câu hỏi tương tự
giải hệ phương trình:
a,left{{}begin{matrix}dfrac{1}{2}left(x+2right)left(y+3right)dfrac{1}{2}xy+50dfrac{1}{2}left(x-2right)left(y-2right)dfrac{1}{2}xy-32end{matrix}right.
b,left{{}begin{matrix}dfrac{-1}{2}x+dfrac{1}{3}y0y-x1end{matrix}right.
c,left{{}begin{matrix}xleft(y-2right)left(x+2right)left(y-4right)left(x-3right)left(2y+7right)left(2x-7right)left(y+3right)end{matrix}right.
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giải hệ phương trình:
a,\(\left\{{}\begin{matrix}\dfrac{1}{2}\left(x+2\right)\left(y+3\right)=\dfrac{1}{2}xy+50\\\dfrac{1}{2}\left(x-2\right)\left(y-2\right)=\dfrac{1}{2}xy-32\end{matrix}\right.\)
b,\(\left\{{}\begin{matrix}\dfrac{-1}{2}x+\dfrac{1}{3}y=0\\y-x=1\end{matrix}\right.\)
c,\(\left\{{}\begin{matrix}x\left(y-2\right)=\left(x+2\right)\left(y-4\right)\\\left(x-3\right)\left(2y+7\right)=\left(2x-7\right)\left(y+3\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}5y-5x=xy\\\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{4}{5}\\\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\dfrac{1}{2x-3y}+\dfrac{5}{3x+y}=\dfrac{5}{8}\\\dfrac{3}{2x-3y}-\dfrac{5}{3x+y}=-\dfrac{3}{8}\\\end{matrix}\right.\)
\(\left\{{}\begin{matrix}x-y=2\\y-3z=2\\-3x-2y+z=-2\end{matrix}\right.\)
Giải hpt \(\left\{{}\begin{matrix}\dfrac{12}{x+y}+\dfrac{12}{x-y}=\dfrac{5}{2}\\\dfrac{4}{x+y}+\dfrac{8}{x-y}=\dfrac{4}{3}\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\dfrac{xy}{x+y}=2\\\dfrac{yz}{y+z}=4\\\dfrac{zx}{z+x}=3\end{matrix}\right.\)
giải hệ phương trình sau
\(\left\{{}\begin{matrix}\dfrac{6}{2x-3y}+\dfrac{2}{x+2y}=3\\\dfrac{3}{x-2y}+\dfrac{4}{x+2y}-1\end{matrix}\right.\)
Giải hệ phương trình:1. left{{}begin{matrix}3sqrt{x}-sqrt{y}52sqrt{x}+3sqrt{y}18end{matrix}right.2. left{{}begin{matrix}sqrt{x+3}-2sqrt{y+1}22sqrt{x+3}+sqrt{y+1}4end{matrix}right.3. left{{}begin{matrix}3sqrt{x}+2sqrt{y}6sqrt{x}-sqrt{y}4,5end{matrix}right.4. left{{}begin{matrix}sqrt{x}+sqrt{y+1}1sqrt{y}+sqrt{x+1}1end{matrix}right.
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Giải hệ phương trình:
1. \(\left\{{}\begin{matrix}3\sqrt{x}-\sqrt{y}=5\\2\sqrt{x}+3\sqrt{y}=18\end{matrix}\right.\)
2. \(\left\{{}\begin{matrix}\sqrt{x+3}-2\sqrt{y+1}=2\\2\sqrt{x+3}+\sqrt{y+1}=4\end{matrix}\right.\)
3. \(\left\{{}\begin{matrix}3\sqrt{x}+2\sqrt{y}=6\\\sqrt{x}-\sqrt{y}=4,5\end{matrix}\right.\)
4. \(\left\{{}\begin{matrix}\sqrt{x}+\sqrt{y+1}=1\\\sqrt{y}+\sqrt{x+1}=1\end{matrix}\right.\)
Giải hệ phương trình:
a,left{{}begin{matrix}text{2
x
−
7
y
20
}text{3
x
+
7
y
−
5}end{matrix}right.
b,left{{}begin{matrix}text{2
x
+
3
y
8
}text{−
3
x
+
5
y
7
}end{matrix}right.
c,left{{}begin{matrix}-2x+frac{1}{2}y3text{5
x
+
3
y
11
}end{matrix}right.
d,left{{}begin{matrix}text{(
x
−
16
)(
y
+
6
)
x
y
−
36
}text{(
x
+
8
)(
y
−
3
)
x
y
−
54
}end{matrix}right.
e,left{{}begin{matrix}text{3
x
−
|
y
|
1
}text{5
x
+
3
y
11
}end{matrix}right.
f,left{{}begin{matrix}frac{3}{x}+frac{4}{y}...
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Giải hệ phương trình:
a,\(\left\{{}\begin{matrix}\text{2 x − 7 y = 20 }\\\text{3 x + 7 y = − 5}\end{matrix}\right.\)
b,\(\left\{{}\begin{matrix}\text{2 x + 3 y = 8 }\\\text{− 3 x + 5 y = 7 }\end{matrix}\right.\)
c,\(\left\{{}\begin{matrix}-2x+\frac{1}{2}y=3\\\text{5 x + 3 y = 11 }\end{matrix}\right.\)
d,\(\left\{{}\begin{matrix}\text{( x − 16 )( y + 6 ) = x y − 36 }\\\text{( x + 8 )( y − 3 ) = x y − 54 }\end{matrix}\right.\)
e,\(\left\{{}\begin{matrix}\text{3 x − | y | = 1 }\\\text{5 x + 3 y = 11 }\end{matrix}\right.\)
f,\(\left\{{}\begin{matrix}\frac{3}{x}+\frac{4}{y}=5\\\frac{1}{x}-\frac{1}{y}=1\end{matrix}\right.\)
g,\(\left\{{}\begin{matrix}x+2\sqrt{y-1}=3\\3x+4\sqrt{y-1}=7\end{matrix}\right.\)
Giúp mình với ạ!!!
giải các hệ phương trình sau:
1, \(\left\{{}\begin{matrix}\left(x+2\right)\left(y-2\right)=xy\\\left(x+4\right)\left(y-3\right)=xy\end{matrix}\right.\)
2, \(\left\{{}\begin{matrix}\frac{1}{x-3}+\frac{1}{y}=2\\\frac{2}{x-3}-\frac{3}{y}=1\end{matrix}\right.\)
Giải hệ pt:
\(\left\{{}\begin{matrix}x^3-y^3=224\\x-y=8\end{matrix}\right.\)
\(\left\{{}\begin{matrix}y+|x|=-1\\y|x|=-12\end{matrix}\right.\)
\(\left\{{}\begin{matrix}x^5+y^5=31\\x+y=1\end{matrix}\right.\)