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30% x y + y = 52
=> 3/10 x y + 1 x y = 52
=> y x (3/10 + 1) = 52
=> y x 13/10 = 52
=> y = 52 : 13/10
=> y = 40
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
30 % x y + y = 52 .
3/10 x y + y = 52 .
( 3/10 + 1 ) x y = 52 .
13/10 x y = 52 .
y = 52 : 13/10 .
y = 40 .
30% x y + y = 52
30% x y +100%× y = 52
y×(30%+100%)
y x 130% = 52
y×1,3 =52
y = 52 : 1,3
y = 40.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(30\%\times y+y=52\)
\(0,3\times y+y\times1=52\)
\(\left(0,3+1\right)\times y=52\)
\(1,3\times y=52\)
\(y=52:1,3\)
\(y=40\)
tk ủng hộ tớ nha
![](https://rs.olm.vn/images/avt/0.png?1311)
30% * y + y=52
\(\frac{3}{10}\)* y+y=52
y*( \(\frac{3}{10}\)+1)=52
y*\(\frac{13}{10}\)=52
y=52:\(\frac{13}{10}\)
y=???(tự tính nha!!!!!!!!)
![](https://rs.olm.vn/images/avt/0.png?1311)
Đổi 30% = 3/10
Ta có: 3/10 x y + y = 52
y x (3/10 + 1) = 52
y x 13/10 = 52
y = 52 : 13/10
y = 40
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
30% x Y+Y=52
\(\frac{3}{10}\) x Y+Y=52
(\(\frac{3}{10}\)+1) x Y=52
\(\frac{13}{10}\) x Y=52
Y=52:\(\frac{13}{10}\)
Y=40
40 nhe
40 nhe