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a) y / 15 - 34,87 = 52,21 + 6
y / 15 - 34,87 = 58,21
y / 15 = 58,21 + 34,87
y / 15 = 93,08
y = 93,08 * 15 = 1396,2
b) 76,22 = y * 3 = 30,61 * 2
76,22 = y * 3 = 61,22
=> 76,22 = 61,22 ( ?! )
Sai đề
![](https://rs.olm.vn/images/avt/0.png?1311)
a) y : 15 - 34,87 = 52,21 + 6 ( tui biet moi cau a thoi)
y : 15 - 34,87 = 58,21
y : 15 = 58,21 - 34,87
y : 15 = 23.34
y = 351
Trl
-Bạn nguyễn minh thu làm đúng rồi nhé ~!
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nhé bạn
![](https://rs.olm.vn/images/avt/0.png?1311)
y : 15 - 34,87 = 52,21 + 6 76,22 - y x 3 = 30,61 x 2
y : 15 - 34,87 = 58,21 76,22 - y x 3 = 61,22
y : 15 = 58,21 + 34,87 y x 3 = 76,22 - 61,22
y : 15 = 93,08 y x 3 = 15
y = 93,08 x 15 y = 15 : 3
y = 1396,2 y = 5
![](https://rs.olm.vn/images/avt/0.png?1311)
y:15-34,87=52,21+6
y:15-34,87=58,21
y:15=58,21+34,87
y:15=93,08
y=93,08x15
y=1396,2
a) y : 15 - 34,87 = 52,21+6 y : 15 - 34,87 = 58,21 y : 15 = 58,21 + 34,87 y : 15 = 93,08 y = 93,08 x 15 y = 1396,2 | b) 76,22 - y x 3 = 30,61 x 2 76,22 - y x 3 = 61,22 y x 3 = 76,22 - 61,22 y x 3 = 15 y = 15 : 3 y = 5 |
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\frac{y}{15}-34,87=52,21+6\)
\(\frac{y}{15}=58,21+34,87\)
\(\frac{y}{15}=93,08\)
\(\Rightarrow y=93,08.15\)
\(\Rightarrow y=1396,2\)
vậy \(y=1396,2\)
b) \(76,22-3y=30,61.2\)
\(76,22-3y=61,22\)
\(3y=76,22-61,22\)
\(3y=15\)
\(y=5\)
vậy \(y=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(76,22-y+3=31,61\)
\(-y+3=31,61-76,22\)
\(-y+3=-44,61\)
\(y=44,61+3\)
\(y=47,61\)
\(y:15-34,87=52,21+6\)
\(y:15-34,87=58,21\)
\(y:15=58,21+34,87\)
\(y:15=93,08\)
\(y=93,08\times15\)
\(y=1396,2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x: 15 - 34,87 = 58,21
x : 15 = 58,21 + 34,87
x: 15 = 93,08
x = 15 x 93,08
x = 1396,2
\(y:15-34,87=52,21+6\)
\(y:15-34,87=58,21\)
\(y:15=58,21+34,87\)
\(y:15=93,08\)
\(y=93,08\times15\)
\(y=1396,2\)
2) \(76,22-y\times3=30,61\times2\)
\(76,22-y\times3=61,22\)
\(y\times3=76,22-61,22\)
\(y\times3=15\)
\(y=15:3\)
\(y=5\)