X + X chia 0,2 =1,35
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x+x:0.2=1.35\)
\(x+x:\frac{1}{5}=1.35\)
\(x+5x=1.35\)
\(6x=1.35\)
\(x=1.35:6\)
\(x=0.225\)
![](https://rs.olm.vn/images/avt/0.png?1311)
X + X : 0,2 = 1,35
X x 1 + X x 5 = 1,35
X x ( 1 + 5 ) = 1,35
X x 6 = 1,35
X = 1,35 : 6
X = 0,225
![](https://rs.olm.vn/images/avt/0.png?1311)
x + x : 0,2 = 1,35
x * 1 + x * 5 = 1,35
x * ( 1 + 5 ) = 1,35
x * 6 = 1,35
x = 1,35 : 6
x = 0,225
![](https://rs.olm.vn/images/avt/0.png?1311)
Lời giải:
$x+\frac{x}{0,2}=1,35$
$x+x\times 5=1,35$
$x\times (1+5)=1,35$
$x\times 6=1,35$
$x=1,35:6=0,225$
![](https://rs.olm.vn/images/avt/0.png?1311)
x:1+x:0.2=1.35
x:(1+0.2)=1.35
1:1.2=1.35
x=1.35*1.2
x=1.62
x+x:0,2=1,35
2x : 0,2=1,25
2x=1,35 x 0,2
2x=0,27
x=0,27:2
x= 0, 135
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,\Rightarrow\left[{}\begin{matrix}x-\dfrac{2}{3}=\dfrac{5}{4}\\\dfrac{2}{3}-x=\dfrac{5}{4}\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=\dfrac{23}{12}\\x=-\dfrac{7}{12}\end{matrix}\right.\\ b,\Rightarrow0,1x\cdot1,35=0,2\cdot1,25=0,25\\ \Rightarrow0,135x=0,25\Rightarrow x=\dfrac{50}{27}\\ c,ĐK:x\ge0\\ PT\Leftrightarrow-2\sqrt{x}=-6\Leftrightarrow x=9\left(tm\right)\\ d,\Leftrightarrow3^{x+2}\cdot2^{x-1}=\left(3^2\cdot2^2\right)^3=3^6\cdot2^6\\ \Leftrightarrow\left\{{}\begin{matrix}x+2=6\\x-1=6\end{matrix}\right.\Leftrightarrow x\in\varnothing\)
X + X chia 0,2 =1,35
=> 2x : 0,2 = 1,35
=> 2x = 1,35 * 0,2
=> 2x = 0,27
=> x = 0,135