2 x 7,65 x 5
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)
2 x 7,65 x 5
= 2 x 5 x 7,65
= 10 x 7,65
= 76,5
25 x 1,9 x 4
= 25 x 4 x 1,9
= 100 x 1,9
= 190
6,92 x 8 x 125
= 8 x 125 x 6,92
= 1000 x 6,92
= 6920
a) 2 x 7,65 x 5
=2 x 5 x 7,65
=10 x 7,65
=76,5
b) 25 x 1,9 x 4
=25 x 4 x 1,9
=100 x 1,9
=190
c) 6,92 x 8 x 125
=6,92 x 1000
=6920
![](https://rs.olm.vn/images/avt/0.png?1311)
1) \(31,5\cdot0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
b)\(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)
1. \(31,5.0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
2. \(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{8}.\frac{2}{3}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 1,26 : x + 2,34 : x =5
\(1,26\times\frac{1}{x}+2,34\times\frac{1}{x}=5\)
\(\frac{1}{x}\times\left(1,26+2,34\right)=5\)
\(\frac{1}{x}\times3,6=5\)
\(\frac{1}{x}=5:3,6\)
\(\frac{1}{x}=\frac{18}{25}\)
\(x=\frac{25}{18}\)
b) \(x\times3,1+x\times6,9=30,4\)
\(x\times\left(3,1+6,9\right)=30,4\)
\(x\times10=30,4\)
\(x=30,4:10\)
\(x=3,04\)
c) \(x:1,5+0,45=7,65\)
\(x:1,5=7,65-0,45\)
\(x:1,5=7,2\)
\(x=1,5\times7,2\)
\(x=11,1\)
Chúc bn học tốt !
![](https://rs.olm.vn/images/avt/0.png?1311)
X : 7,65 x X + 3,58 = 21,94
X x (7,65 + 3,58) = 21,94
X x 11,23 = 21,94
x = 21,94 : 11,23
x = ...........
![](https://rs.olm.vn/images/avt/0.png?1311)
7,65 x x = 21,94 - 3,58
7,65 x x = 18,36
x = 18,36 : 7,65
x = 2,4
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(x:1,5\right)+0,45=7,65\)
=>\(x:1,5=7,65-0,45\)
=>\(x:1,5=7,2\)
=>\(x=7,2\times1,5\)
=>\(x=10,8\)
Vậy x = 10,8
![](https://rs.olm.vn/images/avt/0.png?1311)
`x: 1,5 + 5,25 = 7,65`
`=> x : 1,5= 7,65 - 5,25`
`=> x: 1,5= 2,4`
`=> x= 2,4 xx 1,5`
`=>x= 3,6`
![](https://rs.olm.vn/images/avt/0.png?1311)
7,65 x X + 3,58 = 21,94
7,65 x X = 21,94 - 3,58
7,65 x X = 18,36
X = 18,36 : 7,65
X = 2,4
ai k minh k lai
7,65 * x +3,58=21,94
7,65 * x = 21,94-3,58
7,65* x=18,36
x=18,36:7,65
x=2,4
![](https://rs.olm.vn/images/avt/0.png?1311)
xin lôi nhầm!
0,98+7,65-x=0,04
8,63 - x=0,04
x=8,63-0,04
x=8,59
=(2*5)*7,65
=10*7,65
=76,5