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\(\dfrac{3}{5}\) x 0,25\(x\) = - \(\dfrac{1}{2}\)
0,25\(x\) = - \(\dfrac{1}{2}\) : \(\dfrac{3}{5}\)
0,25\(x\) = - \(\dfrac{1}{2}\) x \(\dfrac{5}{3}\)
0,25\(x\) = - \(\dfrac{5}{6}\)
\(x\) = - \(\dfrac{5}{6}\) : 0,25
\(x\) = - \(\dfrac{5}{6}\) x 4
\(x\) = - \(\dfrac{10}{3}\)
Vậy \(x\) = - \(\dfrac{10}{3}\)
2626 : (\(\dfrac{1}{2}\)\(x\) + \(\dfrac{5}{2}\)\(x\)) = 26
\(\dfrac{1}{2}\)\(x\) + \(\dfrac{5}{2}\)\(x\) = 2626 : 26
\(\dfrac{1}{2}\)\(x\) + \(\dfrac{5}{2}\)\(x\) = 101
\(x\) x ( \(\dfrac{1}{2}\) + \(\dfrac{5}{2}\)) = 101
\(x\) x 3 = 101
\(x\) = 101 : 3
\(x\) = \(\dfrac{101}{3}\)
Vậy \(x\) = \(\dfrac{101}{3}\)
(3x-6).3=34
(3x-6)=34:3
(3x-6)=33
(3x-6)=27
3x=27+6
3x=33
=>x=11
t tôi nha bn
\(\left(\frac{2}{3}x-\frac{1}{2}\right).\frac{3}{4}-\frac{2}{5}x=4\frac{1}{4}\)
\(\frac{1}{2}x-\frac{3}{8}-\frac{2}{5}x=4\frac{1}{4}\)
\(\frac{1}{10}x=\frac{17}{4}+\frac{3}{8}\)
\(\frac{1}{10}x=\frac{37}{8}\)
\(x=\frac{185}{4}\)
\(\left(\frac{2}{3}x-\frac{1}{2}\right).\frac{3}{4}-\frac{2}{5}x=4\frac{1}{4}\)
\(\frac{1}{2}x-\frac{3}{8}-\frac{2}{5}x=\frac{17}{4}\)
\(\frac{1}{2}x-\frac{2}{5}x=\frac{17}{4}+\frac{3}{8}\)
\(\frac{1}{10}x=\frac{37}{8}\)
\(x=\frac{37}{8}:\frac{1}{10}\)
\(x=\frac{185}{4}\)
TH1 : x < -1/30
=> 3/4 - 0,2 x = 3x + 0,1
=> 0,85 = 3,2 x
=> x = 64/17 > -1/30 ( loại )
TH2 : 15/4 > x > -1/30
=> 3/4 - 0,2 x = -3x + 1
=> -1/4 = -3,2x
=> x = 12,8 > 15/4 ( loại )
TH3 : x > 15/4
=> 0,2x - 3/4 = -3x + 0,1
=> - 3,2x = -0,85
=> x = 17/64 < 15/4 ( loại )
Vậy x thuộc rỗng
\(\frac{3x-4}{2}=\frac{1}{3}\)
\(\Leftrightarrow\left(3x-4\right)\cdot3=1\cdot2\) ( nhân chéo )
\(\Leftrightarrow9x-12=2\)
\(\Leftrightarrow9x=2+12=14\)
\(x=\frac{14}{9}\)
Vậy ....
\(\frac{3x-4}{2}=\frac{1}{3}\)
\(\Rightarrow3\left(3x-4\right)=1.2\)
\(\Rightarrow9x-12=2\)
\(\Rightarrow9x=2+12\)
\(\Rightarrow9x=14\)
\(\Rightarrow x=14:9\)
\(\Rightarrow x=\frac{14}{9}\)
Vậy \(x=\frac{14}{9}\)
_Chúc bạn học tốt_
\(\hept{\begin{cases}4-4x⋮1-3y\\\\1-3y⋮1-3y\end{cases}\Rightarrow\hept{\begin{cases}12-12y⋮1-3y\\\\4-12y⋮1-3y\end{cases}}}\)
\(\Rightarrow\left(12-12y\right)-\left(4-12y\right)⋮1-3y\)
\(\Leftrightarrow8⋮1-3y\)
\(\Rightarrow1-3y\varepsilon\left\{1;2;4;8\right\}\)
\(\Rightarrow3y\varepsilon\left\{0;1;3;7\right\}\)
\(\Leftrightarrow y\varepsilon\left\{0;1\right\}\)
( 3x - 24 ) . 73 = 2 . 74
( 3x - 24 ) = 2 . 74 : 73
( 3x - 24 ) = 2 . 7
3x - 24 = 14
3x = 14 + 24
3x = 14 + 16
3x = 30
x = 10
- Hok T -
`3x-4=26`
`=>3x=26+4`
`=>3x=30`
`=>x=30/3`
`=>x=10`
Vậy: ...
\(3x-4=26\Leftrightarrow3x=30\Leftrightarrow x=10\)