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![](https://rs.olm.vn/images/avt/0.png?1311)
\(x+x\cdot3:\dfrac{2}{9}+x:\dfrac{2}{7}=252\)
\(\Leftrightarrow x+x\cdot3\cdot\dfrac{9}{2}+x\cdot\dfrac{7}{2}=252\)
\(\Leftrightarrow x\cdot18=252\)
hay x=14
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x:(1.24+3.56)-0.249=1.451
x:4,8-0,249 =1,451
x:4,8 =1,451 +0,249
x:4,8 =1,7
x =1,7 x 4,8
x =8,16
x : ( 1.24 + 3.56) - 0.249 = 1.451
x : ( 1.24 + 3.56) = 1.451 + 0.249
x : ( 1.24 + 3.56) = 1.7
x : 4.8 = 1.7
x = 1.7 x 4.8
x = 8.16
k mình nhé !!!
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =>x:6,5=57,7
hay x=373,75
b: =>x:2,4=45.4
hay x=108,96
\(x:6,5=\dfrac{577}{10}\Leftrightarrow x=\dfrac{7201}{20}\)
\(x:2,4=45,4\Leftrightarrow x=\dfrac{2724}{25}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
=55,45 nhân 33- 23 nhan (45,45+10)
=55,45 nhân 33-23 nhân 55,45
=55,45 nhân (33-23)
=55,45 nhân 10
=554,5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(x+\dfrac{1}{3}\right)\times\dfrac{9}{14}\times\dfrac{7}{3}-\dfrac{1}{3}=1:\dfrac{9}{5}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}-\dfrac{1}{3}=\dfrac{5}{9}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{5}{9}+\dfrac{1}{3}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{8}{9}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{8}{9}:\dfrac{3}{2}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{16}{27}\\ \Rightarrow x=\dfrac{16}{27}-\dfrac{1}{3}\\ \Rightarrow x=\dfrac{7}{27}\)
1,x=2135
2,x=3156
3,x=5126
4,x=1797
5,x=134
6,x=767
7,x=39396
8,x=170
hok tốt