Y÷2+y÷3+y÷4=25
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\(\text{y : 2 + y + y : 3 + y : 4 = 25}\)
\(\text{1/2 .y + y + 1/3 . y + 1/4 . y = 25}\)
\(\text{y . (1/2 + 1/3 + 1/4 + 1) = 25}\)
\(\text{y . 25/12 = 25}\)
\(\text{y = 25 : 25/12 = 25 . 12/25}\)
\(\text{y = 12 }\)
Vậy \(y=12\)
\(y:2+y+y:3+y:4=25\\ y:\left(2+3+1+4\right)=25\\ y:10=25\\ y=25x10\\ y=250.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
y : ( 2 + 1 + 3 + 4) = 25
y : 10 = 25
y = 25 x 10
y = 250
![](https://rs.olm.vn/images/avt/0.png?1311)
y : 2 + y + y : 3 + y : 4 = 25
1/2 * y + y + 1/3 * y + 1/4 * y = 25
y * (1/2 + 1/3 + 1/4 + 1) = 25
y * 25/12 = 25
y = 25 : 25/12 = 25 * 12/25
y = 12
y = 12
Thử lại :
12 : 2 + 12 + 12 : 3 + 12 : 4 = 25
6 + 12 +4 +3 = 25
![](https://rs.olm.vn/images/avt/0.png?1311)
y : 2 + y + y : 3 + y : 4 = 25
y : 2 + y : 1 + y : 3 + y : 4 = 25
y : ( 2 + 1 + 3 + 4 ) = 25
y : 10 = 25
y = 25 x 10
y = 250
\(y:2+y+y:3+y:4=25\Rightarrow y\times\frac{1}{2}+y+y\times\frac{1}{3}\)\(+y\times\frac{1}{4}=25\)
\(\Rightarrow y\times\left(\frac{1}{2}+1+\frac{1}{3}+\frac{1}{4}\right)=25\Rightarrow y\times\frac{25}{12}=25\Rightarrow y=25:\frac{25}{12}\Rightarrow y=12\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(y:2+y:3+y:4=25\)
\(y:\left(2+3+4\right)\)\(=25\)
\(y:9\) \(=25\)
\(y=25.9\)
\(nha^{ }\)
\(y=225\)
y:2+y:1+y:3+y:4=25
y:(1+2+3+4)=25
y:10=25
y=25*10
y=250