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125 \(\times\) y - 12 \(\times\)y - 13 \(\times\) y = 5208000
y \(\times\)( 125 - 12 - 13) = 5208000
y \(\times\) 100 = 52008000
y = 5208000 : 100
y = 52080
![](https://rs.olm.vn/images/avt/0.png?1311)
125 \(\times\) y - 12 \(\times\) y - 13 \(\times\) y = 5208000
y \(\times\) ( 125 - 12 - 13) = 5208000
y \(\times\) 100 = 5 208 000
y = 5 208 000 : 100
y = 52 080
![](https://rs.olm.vn/images/avt/0.png?1311)
125.y-12.y-13.y=5208000
(125-12-13).y=5208000
100.y=5208000
y=5208000:100
y=52080
![](https://rs.olm.vn/images/avt/0.png?1311)
`1716:y=12xx13`
`1716:y=156`
`y=1716:156`
`y=11`
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`y xx 2/3+y xx 1/6=10/3`
`y xx(2/3+1/6)=10/3`
`y xx(4/6+1/6)=10/3`
`y xx5/6=10/3`
`y=10/3:5/6`
`y=10/3xx6/5=4`
1716 : y = 12 \(\times\) 13
1716 : y = 156
y = 1716 : 156
y = 11
\(y\times\dfrac{2}{3}+y\times\dfrac{1}{6}=\dfrac{10}{3}\)
\(y\times\left(\dfrac{2}{3}+\dfrac{1}{6}\right)=\dfrac{10}{3}\)
\(y\times\dfrac{5}{6}=\dfrac{10}{3}\)
\(y=\dfrac{10}{3}:\dfrac{5}{6}\)
\(y=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
yx12+yx13-y=4872
yx(12+13-1)=4872
yx24=4872
y=4872:24
y=203
vay y=203
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(24\times y+76\times y=100\)
\(\Rightarrow\left(24+76\right)\times y=100\)
\(\Rightarrow100\times y=100\)
\(\Rightarrow y=100:100\)
\(\Rightarrow y=1\)
b) \(125\times y-100\times y=1000\)
\(\Rightarrow\left(125-100\right)\times y=1000\)
\(\Rightarrow25\times y=1000\)
\(\Rightarrow y=1000:25\)
\(\Rightarrow y=40\)
![](https://rs.olm.vn/images/avt/0.png?1311)
y x 4 + y x 6 = 1850
y x ( 4 + 6 ) = 1850
y x 10 = 1850
y = 1850 : 10
y = 185
y x 125 - y x 25 = 9000
y x ( 125 - 25 ) = 9000
y x 100 = 9000
y = 9000 : 100
y = 90
* y x 4 + y x 6 = 1850
y x (4 + 6) = 1850
y x 10 = 1850
y = 1850 : 10 = 185
* y x 125 - y x 25 = 9000
y x (125 - 25) = 9000
y x 100 = 9000
y = 9000 : 100 = 90
![](https://rs.olm.vn/images/avt/0.png?1311)
a
x | 8 | 30 | 100 |
125 + x | 125 + 8 = 133 | 125 + 30 = 155 | 125 + 100 = 225 |
b
y | 200 | 960 | 1350 |
y - 20 | 200 - 20 = 180 | 960 - 20 = 940 | 1350 - 20 = 1330 |