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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=> \(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=> \(x.\frac{1}{5}=\frac{3}{4}\)
<=> \(x=\frac{3}{4}:\frac{1}{5}\)
<=> \(x=\frac{15}{4}\)
kết luận : \(x=\frac{15}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=>\(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=>\(x.\frac{1}{5}=\frac{3}{4}\)
<=>\(x=\frac{3}{4}:\frac{1}{5}\)
<=>\(x=\frac{15}{4}\)
vậy \(x=\frac{15}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
0,4x-1/5=3/4
0.4x=3/4+1/5
0.4x=19/20
x=19/20:0,4
x=19/8=2,375
k mik nha ^o^
\(0,4x-\frac{1}{5}=\frac{3}{4}\)
\(0,4x=\frac{19}{20}\)
\(x=\frac{19}{8}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(0,25x=100:\frac{1}{2}\)
\(0,25x=200\)
\(x=200:0,25\)
\(x=800\)
k cho mình nha
\(0,25x=100:\frac{1}{2}\)
\(\frac{1}{4}.x=100.2\)
\(\frac{1}{4}x=200\)
\(x=200:\frac{1}{4}\)
\(x=200.4\)
\(x=800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:60\%+0,4x=2\)
\(\Rightarrow\dfrac{5}{3}x+0,4x=2\)
\(\Rightarrow\left(\dfrac{5}{3}+0,4\right)x=2\)
\(\Rightarrow\dfrac{31}{15}x=2\)
\(\Rightarrow x=2:\dfrac{31}{15}\)
\(\Rightarrow x=\dfrac{30}{31}\)
#DarkPegasus
60% + 0,4x=2
0,4x=2-60%
0,4x=2-0,6
0,4x=1,4
x=1,4:0,4
x=3,5
Vậy:...
nhớ ticks nhe
![](https://rs.olm.vn/images/avt/0.png?1311)
\(60\%.x-0,4.x+x:3=2\)
\(\dfrac{3}{5}.x-\dfrac{2}{5}.x+\dfrac{1}{3}.x=2\)
\(x\left(\dfrac{3}{5}-\dfrac{2}{5}+\dfrac{1}{3}\right)=2\)
\(x.\dfrac{8}{15}=2\)
\(x=2:\dfrac{8}{15}\)
\(x=\dfrac{15}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x-0,25x=0,5
x(1-0,25)=0,5
x.0,75=0,5
x=0,5:0,75
x=\(\frac{2}{3}\)
Vậy x=\(\frac{2}{3}\)
0,25x -0,4x = 1
x(0,25 - 0,4) = 1
-0,15x =1
x = 1 : (-0,15)
x = - 20/3