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\(\left(0,4x-2\right)-\left(1,5x+1\right)-\left(-4x-0,8\right)=3,6\)
\(0,4x-2-1,5x-1+4x+0,8=3,6\)
\(2,9x-2,2=3,6\)
\(2,9x=5,8\)
\(x=2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
0,25x -0,4x = 1
x(0,25 - 0,4) = 1
-0,15x =1
x = 1 : (-0,15)
x = - 20/3
![](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)
\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=> \(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=> \(x.\frac{1}{5}=\frac{3}{4}\)
<=> \(x=\frac{3}{4}:\frac{1}{5}\)
<=> \(x=\frac{15}{4}\)
kết luận : \(x=\frac{15}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(0,4x - 1,3 )2 = 5,29 = (2,3)2
=> 0,4x - 1,3 = 2,3
=> 0,4x = 2,3 +1,3 = =3,6
=> x = \(\frac{3,6}{0,4}=9\)
\(\left(0,4x-1,3\right)^2=5,29\)
\(\left(0,4x-1,3\right)=\sqrt{5,29}\)
\(\left(0,4x-1,3\right)=2,3\)
\(0,4x=2,3+1,3\)
\(0,4x=3,6\)
\(x=3,6:0,4\)
\(x=9\)
![](https://rs.olm.vn/images/avt/0.png?1311)
60%x + 0,4x + x:3 = 2
\(\frac{3}{5}x+\frac{2}{5}x+\frac{1}{3}x=2\)
\(\left(\frac{3}{5}+\frac{2}{5}+\frac{1}{3}\right)x=2\)
\(\frac{4}{3}x=2\)
\(x=2:\frac{4}{3}\)
\(x=\frac{3}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
x .12 , 5 = 1 , 2 + 25 % x .12 , 5 = 1 , 2 + 0 , 25 x .12 , 5 = 1 , 45 x = 1 , 45 : 12 , 5 x = 0 , 116
b)
0 , 4 x − 1 5 x = 3 4 2 5 − 1 5 x = 3 4 1 5 x = 3 4 x = 15 4
Đề thiếu nha cậu.
= -0,9x -0,8
0,9x = -0,8
x = -1,125