Các câu hỏi tương tự
tim x, y, z biet
1. \(\frac{x+y}{2015}=\frac{xy}{2016}=\frac{x-y}{2017}\)
2.\(\frac{2x+2}{3}=\frac{3y-1}{4}=\frac{4x+2}{5}\)va x+y+z=7
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
Tim cac so x,y,z biet \(\frac{x}{5}=\frac{y}{7}=\frac{z}{3}\)va x2 va y2 va z2
TIM X, Y ,Z , BIET :\(\frac{x-2}{6}=\frac{y+3}{9}=\frac{z-7}{10}\)va \(x+y+z=106\)
tim x,y,z biet : \(\frac{x-y}{10}\)=\(\frac{y+z}{5}\):\(\frac{x+y}{7}\)=\(\frac{y-z}{-8}\)va x-2y+z=72
tim x;y;z biet x/3=y/4;y/5=z/7 va x+y+z=98
3.Tim x,y,z biet
a,\(\frac{x}{5}=\frac{y}{7};x.y=315\)
b,\(5x=9y;2x+3y=-33\)
c,\(\frac{x}{5}=\frac{y}{7}=\frac{z}{9};2x+y-3z=20\)
d,\(\frac{x}{4}=\frac{5}{y}=\frac{z}{6};2x^2-y^2+\frac{1}{2}z^2=100\)
e,\(\frac{x}{5}=\frac{y}{4}=\frac{7}{7};x+y-z=-10\)
g, 2x=5y=3z;x-y+z=38
Tim x,y,z biet \(\frac{12x-15y}{7}=\frac{20z-12x}{9}=\frac{15y-20z}{11}\) va x+y+z=48
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