![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
210 : y = 14.75 + 6.25
=>210 : y = 21
=> y = 210 : 21=10
vậy y = 10
k nha
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
14,75 + 8,96 + 6,25 = (14, 75 + 6,25) + 8,96
= 21 + 8,96
= 29,96
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 1 ko hiểu đề bài lắm
\(2.Y\times\left(2+0,5\right)=6,25\)
\(Y\times2,5=6,25\)
\(Y=6,25:2,5\)
\(Y=2,5\)
\(3.Y\times6=99,75:4,75\)
\(Y\times6=21\)
\(Y=21:6\)
\(Y=3,5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
= y + 4 + y + 6 + y + 8 + ... + y + 26 = 210
=> (y + y + y+ ... + y) + (4 + 6 + 8 + ... + 26) = 210
=> 12y + 180 = 210
12y = 210 -180
12y = 30
y = 30 : 12
y = 2.5
Đáp số : 2.5
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(210:x=2,1:0,25=8,4\)
\(x=210:8,4=25\)
b) \(x.2+x.0,5=6,25\)
\(2,5x=6,25\)
\(x=6,25:2,5=2,5\)
c) \(x:0,25-x=15,6\)
\(3x=15,6\)
\(x=5,2\)
d) \(x:12,5=3,75.4=15\)
\(x=15.12,5=187,5\)
e) \(x.12,6-x.5,6=42\)
\(7x=42\)
\(x=6\)
g) \(x:0,1-x:4-x.0,75=2,25\)
\(10x-\dfrac{x}{4}-\dfrac{3x}{4}=2,25\)
\(9x=2,25\)
\(x=0,25\)
210 : y = 14,75 + 6,25
210 : y = 21
y = 210 : 21
y = 10
210:y=14,75+6,25
210:y=21
=> y=210:21=10
Ủng hộ mk nka!!!^_^