Các câu hỏi tương tự
Tim x,y,z biet :x+2/7 =y-3/5 =z/3 va x+y - z = -17
_GIUP_MINH_VOI_NHE_MK_TICK_CHO
BAI 1 : Tim x;y;z biet 6x 3/5 4y 6x/7 3z 4y Va 2x 3y 5z 21
tim x y z biet x-1/2=y-2/3=z-3/4 biet x-2y+3z=14
Tim x,y,z biet x-1, y+3, z-5 voi ti le 2,4,6 va -3x - 4y + 3z = 50
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 x;y;z biet x/3=y/4;y/5=z/7 va x+y+z=98
(3|x|+5)/3=(3|y|-1)/5=(3-z)/7 vaf 2|x|+7|y|+3z=-14
Tim cac so x,y,z biet \(\frac{x}{5}=\frac{y}{7}=\frac{z}{3}\)va x2 va y2 va z2
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