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\(y\cdot9,6+y:2,5=45\)
\(y\cdot9,6+y=45\cdot2,5\)
\(y\cdot9,6+y=112,5\)
\(y\cdot2\cdot9,6=112,5\)
\(y\cdot19,2=112,5\)
\(y=112,5:19,2\)
\(y=\text{5.859375}\)
Dấu \(\cdot\)là dấu nhân nha bạn !
Y x 9,6 + Y : 2,5 = 45
Y x 9,6 + Y x 0,4 = 45
Yx(9,6+0,4)=45
Yx 10=45
Y=45:10=4,5
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(y:10+y.3,9=4,8\)
\(\Rightarrow y.0,1+y.3,9=4,8\)
\(\Rightarrow y.\left(0,1+3,9\right)=4,8\)
\(\Rightarrow y.4=4,8\)
\(\Rightarrow y=1,2\)
Vậy y = 1,2
b) \(y.2,5+y.7,5=12,8\)
\(\Rightarrow y.\left(2,5+7,5\right)=12,8\)
\(\Rightarrow y.10=12,8\)
\(\Rightarrow y=1,28\)
Vậy y = 1,28
![](https://rs.olm.vn/images/avt/0.png?1311)
X × 2,5 + 7,5 = 36,5
X × 2,5 = 36,5 - 7,5
X × 2,5 = 29
X = 29 : 2,5
X = 11,6
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a) 2,75:x-7,5=2,5
=> 2,75:x =2,5+7,5
=> 2,75:x =10
=> x =2,75:10
=> x =0,275
b) x=(14577-468):0,0001
=> x=14109:0,0001
=> x=141090000
2,75 : x - 7,5 = 2,5
2,75 : x = 2,5 + 7,5
2,75 : x = 10
x = 10 x 2,75
x = 27,5
x = ( 14577 - 468 ) : 0,0001
x = 14109 : 0,0001
x = 141090000
k mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
3:
a: =100+100=200
b: =4,5(5,5+4,7)
=4,5*10,2
=45,9
c: =7,5*10=75
\(y:2,5+9,6\cdot y=7,5-3\)
\(y:\frac{25}{10}+9,6\cdot y=4,5\)
\(y\cdot\frac{10}{25}+9,6\cdot y=4,5\)
\(y\cdot0,4+9,6\cdot y=4,5\)
\(y\left(0,4+9,6\right)=4,5\)
\(y\cdot10=4,5\)
\(\Rightarrow y=0,45\)
P/s: Hoq chắc :<
y : 2,5 + 9,6 x y = 7,5 - 3
y : \(\frac{25}{10}\) + \(\frac{96}{10}\) x y = 3,5
y x \(\frac{10}{25}\)+ \(\frac{96}{10}\) x y = 3,5
y x (\(\frac{2}{5}+\frac{48}{5}\)) = \(\frac{35}{10}\)
y x \(\frac{50}{5}\)= \(\frac{7}{2}\)
y x 10 = \(\frac{7}{2}\)
y = \(\frac{7}{2}\) : 10
y = \(\frac{7}{2}\) x \(\frac{1}{10}\)
y = \(\frac{7}{20}\)
Ko bik đúng hay ko nữa, sai thì thui đừng k sai nha