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\(\frac{-x}{10}=\frac{-7}{y}=\frac{-z}{24}=-\frac{3}{6}\)
\(\Rightarrow\frac{-x}{10}=-\frac{3}{6}\Rightarrow-x=10.\left(-3\right):6=-5\Rightarrow x=5\)
\(\Rightarrow\frac{-7}{y}=-\frac{3}{6}\Rightarrow y=-7.6:\left(-3\right)=14\)
\(\Rightarrow\frac{-z}{24}=-\frac{3}{6}\Rightarrow-z=24.\left(-3\right):6=-12\Rightarrow z=12\)
\(\Leftrightarrow\hept{\begin{cases}x=5\\y=14\\z=12\end{cases}}\)
\(\Leftrightarrow\frac{-2}{17}\le\frac{x}{17}\le\frac{2}{17}\Rightarrow x\in\left(-2;-1;0;1;2\right)\)
\(\Leftrightarrow\frac{-1}{24}\le\frac{x}{24}\le\frac{5}{24}\Rightarrow x\in\left(-1;0;1;2;3;4;5\right)\)
2 câu sau tự làm nha
\(-\frac{5}{17}+\frac{3}{17}\le\frac{x}{17}\le\frac{13}{17}+-\frac{11}{17}\)
\(\frac{-2}{17}\le\frac{x}{17}\le\frac{2}{17}\)
=> \(x\in\left\{-2;-1;0;1;2\right\}\)
\(\frac{-12}{6}=\frac{x}{5}=\frac{-y}{3}=\frac{z}{-17}=\frac{-t}{-9}\)
=> \(\frac{x}{5}=-2\)
=>x = -10
=> \(\frac{-y}{3}=-2\)
=> -y = -6
=> y = 6
=> \(\frac{z}{-17}=-2\)
=> z = 34
=>\(\frac{-t}{-9}=\frac{t}{9}=2\)
=> t = 18
vậy x = -10 ; y = 6 ; z = 34 ; t = 18
duyệt nha các bn
Ta có :
\(\frac{-16}{32}=\frac{-16:16}{32:16}=\frac{-1}{2}\)
+)\(\frac{-1}{2}=\frac{x}{-10}\)
=> (-10) x (-1) = X x 2
=> 10 = X x 2
=> X = 10 : 2
=> X = 5
+) \(\frac{-1}{2}=\frac{-7}{y}\)
=> (-1) x Y = (-7) x 2
=> -Y = -14
=> Y = 14
+)\(\frac{-1}{2}=\frac{z}{24}\)
=> (-1) x 24 = Z x 2
=> -24 = Z x 2
=> Z = -24 : 2
=> Z = -12
Kết luận : X = 5
Y = 14
Z = 12
1)
a)
\(\frac{-5}{6}.\frac{120}{25}< x< \frac{-7}{15}.\frac{9}{14}\)
\(\frac{-1}{1}.\frac{20}{5}< x< \frac{-1}{5}.\frac{3}{2}\)
\(\frac{-20}{5}< x< \frac{-3}{10}\)
\(\frac{-40}{10}< x< \frac{-3}{10}\)
\(\Rightarrow Z\in\left\{-4;-5;-6;-7;-8;-9;-10;...;-39\right\}\)
\(\frac{-24}{12}=\frac{x}{5}=\frac{-y}{3}=\frac{-z}{17}=\frac{t}{9}\)
\(\Rightarrow\frac{-24}{12}=\frac{x}{5}\Rightarrow12.x=-120\Rightarrow x=-10\)
\(\Rightarrow\frac{-24}{12}=\frac{-y}{3}\Rightarrow-12.y=-72\Rightarrow y=6\)
\(\frac{-24}{12}=\frac{-z}{17}\Rightarrow-12.z=-408\Rightarrow z=34\)
\(\Rightarrow\frac{-24}{12}=\frac{t}{9}\Rightarrow12.t=-216\Rightarrow t=-18\)
VẬY \(x=-10;y=6;z=34;t=-18\)