tim x,y,z khi
\(\frac{x}{7}=\frac{y}{3}va\)x-24=y
\(\frac{x}{5}=\frac{y}{7}=\frac{z}{2}\)va y-x=48
\(\frac{x}{2}=\frac{y}{3};\frac{y}{4}=\frac{z}{5}\)va x-y- z=28
\(\frac{x}{3}=\frac{y}{5}=\frac{z}{7}\)va 2x+3-z=-14
C, CHO 7X=3Y VA X -Y =16
D, CHO \(\frac{X}{2}=\frac{Y}{3}=\frac{Z}{4}\)VA A +2B -3C = -20
E, CHO X :Y :Z =7:4:2 VA X- 3Z =9
F,CHO \(\frac{X}{Y}=\frac{7}{10};\frac{Y}{Z}=\frac{10}{3}\)VA X+Y+Z=120
G,CHO 3X=4Y=5Z VA X-Y-Z=-42
Tim x,y,z :
a) x=y:2,\(\frac{y}{4}=\frac{z}{5}\)va 2x+2y-z-7=0
b)\(\frac{1}{2}x=\frac{2}{3}y=\frac{3}{4}z\)va x-y=15
c)\(\frac{x}{y}=\frac{2}{3}\), \(\frac{x}{z}=\frac{1}{2}\)va \(x^3\)- xyz=-16
Bài 1: Tìm x,y,z biết rằng.
a)\(\frac{x}{10}=\frac{y}{6}=\frac{z}{21}\)và 5x+y-2z=28
b)\(\frac{x}{3}=\frac{y}{4},\frac{y}{5}=\frac{z}{7}va\)2x+3y-z=124
c)\(\frac{2x}{3}=\frac{3y}{4}=\frac{4z}{5}\)và x+y+z
Tim x,y,z biet
a,5x= 8y= 20z va x-y-z = 3
b,\(\frac{6}{11}x=\frac{9}{2}y=\frac{18}{5}z\)va -x+y+z =120
c,\(\frac{x}{12}=\frac{y}{9}=\frac{z}{5}\)va x . y . z =20
d,\(\frac{x}{5}=\frac{y}{7}=\frac{z}{3}\)va \(^{x^2+y^2-z^2}\)=585
\(\frac{x}{2}=\frac{y}{3};\frac{y}{4}=\frac{z}{5};x+y-z=10\)
tìm x,y,z biết x+y-z =10
\(\frac{x-1}{3}=\frac{y-2}{4}=\frac{z-3}{5}\) va x+y+z=30.Tim x,y,z
Bài 1
Tìm x , y, z biết :
a) \(\frac{x}{6}=\frac{y}{-5}=\frac{z}{4}\)và 2x + y - 3z = 35
b) \(\frac{x}{2}=\frac{y}{3},\frac{y}{4}=\frac{z}{5}\)và x + y - z = 10
c) \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\)và x - 2y + 3z = -10
d) 5.x = 3 .y= 2.z và x + y +z = 62
giúp mình giaiar bài này với
\(\frac{x}{2}=\frac{y}{3};\frac{y}{4}=\frac{z}{5}\)và x+y-z=10
tìm 3 số x,z,y
