\(\frac{12x-15y}{7}=\frac{20z-12x}{9}=\frac{15y-20z}{11}=\frac{12x-15y+20z-12x+15y-20z}{7+9+11}=0\)
\(12x-15y=0\Rightarrow4x=5y\Rightarrow\frac{x}{5}=\frac{y}{4}\)
\(20z-12x=0\Rightarrow5z=3x\Rightarrow\frac{z}{3}=\frac{x}{5}\)
\(15y-20z=0\Rightarrow3y=4z\Rightarrow\frac{y}{4}=\frac{z}{3}\)
\(\Rightarrow\frac{x}{5}=\frac{y}{4}=\frac{z}{3}=\frac{x+y+z}{5+4+3}=\frac{48}{12}=4\)
ta có;x=4x5=20
y=4x4=16
z=4x3=12
sde dQTYTWAYEGFSAYEFGEYSARR WAFWIUFB A RR qiiRY ii yÌU ẨU YIUWYR URH Y Y2QUR2QGyrg Y4
KQWFJ | Ị |
Ị | Ị |
Ị | Ị |
ỊIW | FU |
ÌUEI | F |
ỊU | ÌU |
I | ÌUI |
FUI | ÙI |
Ù | 8FU |
ÌU | ÌU |
Ì | ÌU |
ÌU | ÌU |
ÌU | Ì |
Ì | IUI |
I | |
I | I |
I | FI |
I | Ì |
Ì | ÙIU |
Ì | IUFI |
I | I |
I | |
IU | IU |
Ì | FIF |
IU | UI |
U | FJ |
JFI | FUFNUFYFFTCBBYY |
7 | |
7 | ỲB |
FYD | YC87BBDYBUDYYY |
Y | |
7FYTF7 | YB7BDYD7OYBE |
Y | 7 |
YD7DY7YB | 7 YB |
ED7 | YE7 |
YD87 | BEY |
7BE8 | YDU |
E7E | YEQY7 |
7YYE7 | YE7 |
YE | 7WY |
7 | 7WY |
7 | YWWY |
7 | |
78YW7 | Y 7W |
YW7 | ƯY |
7EY | 7EYE7BEY |
7EE7 | BYE |
7EY | E7 |
YE7Y 7 | Y |
7EYB | 7EY |
7EY | 7E |