Ta có:\(\dfrac{-4}{8}\)=\(\dfrac{x}{-10}\)\(\Rightarrow\)x=\(\dfrac{-4.-10}{8}\)=5
\(\dfrac{-4}{8}\)=\(\dfrac{-7}{y}\)\(\Rightarrow\)y=\(\dfrac{-7.8}{-4}\)=14
\(\dfrac{-4}{8}\)=\(\dfrac{z}{6}\)\(\Rightarrow\)z=\(\dfrac{-4.6}{8}\)=-3
Vậy x=5;y=14;z=-3.
Help me
\(\dfrac{x+3}{5}-\dfrac{1}{y-1}=\dfrac{2}{5}\)
\(-1-\dfrac{7}{14}\le\dfrac{x}{3}\le1+\dfrac{12}{48}\)
\(\dfrac{2y+7}{y-2}\in Z\)
Tìm các số Nguyên x,y,z biết:
a, \(\dfrac{-10}{15}\)=\(\dfrac{x}{-9}\)=\(\dfrac{-8}{y}\)=\(\dfrac{z}{-21}\)
b,\(\dfrac{-7}{6}\)=\(\dfrac{x}{18}\)=\(\dfrac{-98}{y}\)=\(\dfrac{-14}{z}\)
Bài 1: tìm các số x,y,z
a,\(\dfrac{x}{4}\)=\(\dfrac{y}{3}\)=\(\dfrac{z}{9}\)và x-3y+4z=62
b,\(\dfrac{x}{y}\)=\(\dfrac{9}{7}\);\(\dfrac{y}{z}\)=\(\dfrac{7}{3}\)và x-y+z=-15
c,\(\dfrac{x}{y}\)=\(\dfrac{7}{20}\);\(\dfrac{y}{z}=\dfrac{7}{3}\) và 2x+5y-2z=100
bài 2 tìm các số x,y,z
a,5x=8y=20z và x-y-z=3
b,\(\dfrac{6}{11}\)x=\(\dfrac{9}{2}y\)=\(\dfrac{18}{5}z\) và -x+y+z=-120
bài 3:tìm x,y,z biết
a,\(\dfrac{x}{12}\)=\(\dfrac{y}{9}=\dfrac{z}{5}\)và xyz=20
b,\(\dfrac{x}{5}=\dfrac{y}{7}=\dfrac{z}{3}\)và x2 + y2 -z2 =585
Bài 1: tìm các số x,y,z
a,\(\dfrac{x}{4}=\dfrac{7}{3}=\dfrac{z}{9}\) và x-3y+4z=62
b,\(\dfrac{x}{y}=\dfrac{9}{7}\);\(\dfrac{y}{z}=\dfrac{7}{3}\)và x-y+z=-15
c,\(\dfrac{x}{y}=\dfrac{7}{20}\);\(\dfrac{y}{x}=\dfrac{7}{3}\)và 2x+5y-2z=100
a)\(\dfrac{-10}{8}=\dfrac{x}{-4}=\dfrac{-2}{y}=\dfrac{z}{-12}\)
Tìm x , y biết
h) y + 30% y = -1,3
i) \(\left(\dfrac{31}{7}+1\right):\left(-4\right)=\left(\dfrac{-1}{28}\right)\)
j) x : \(\dfrac{4}{28}=\dfrac{13}{-19}+\dfrac{8}{25}\)
k) \(\dfrac{3}{4}-x=\dfrac{5}{9}+\dfrac{6}{11}\)
help me !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
tìm 3 số x,y,z biết: \(\dfrac{x}{2}=\dfrac{y}{3}\) , \(\dfrac{y}{4}=\dfrac{z}{5}\) và x + y -z = 10
TÌM x , y \(\in\) Z biÊt :
a , \(\dfrac{x-4}{y-3}\) = \(\dfrac{4}{3}\) vÀ x - y = 5
Help me !!!
Cho \(\dfrac{x}{y}+z+t=\dfrac{y}{z}+t+x=\dfrac{z}{t}+x+y=\dfrac{t}{y}+y+z\)
P=x+\(\dfrac{y}{z}+t+y+\dfrac{z}{t}+x+z+\dfrac{t}{x}+y+t\dfrac{x}{y}+z\)
Ai giúp mk với nha
