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(3,7*x)+5,28=14,9
3,7*x =14,9-5,28
3,7*x =9,62
x =9,62:3,7
x =2,6
![](https://rs.olm.vn/images/avt/0.png?1311)
a) x + 5,28 = 9,19 b) x - 34,87 = 58,21 c) x + 37,66 = 80,94
x = 9,19 - 5,28 x = 58,21 + 34,87 x = 80,94 - 37,66
x = 3.91 x = 89.08 x = 43,28
a, x+5,28=9,19 c, x+37,66=80,84
x=3,91 x=43,18
b, x-34,87=58,21 d, 76,22-x=38,08
x=93,08 x=38,14
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A = 19,19 x 2525,25
A = 19 x 1,01 x 25 x 101,01
B = 25,25 x 1919,19
B = 25 x 1,01 x 19 x 101,01
Vậy A = B
\(\text{+)}\)
\(A=19,19.2525,25\)
\(A=19.1,01.25.101,01\)
\(\text{+)}\)
\(B=25,25.1919,19\)
\(B=25.1,01.19.101,01\)
\(\Rightarrow A=B\)
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a) x + 5,28 =9,19 b)tự học nhé neko bye
x=9,19-5,28
x=3,91
a) \(x+5,28=9,19\)
\(x=9,19-5,28\)
\(x=3,91\)
b) \(x+37,66=80,84\)
\(x=80,84-37,66\)
\(x=43,18\)
c) \(x-34,87=58,21\)
\(x=58,21+34,87\)
\(x=93,08\)
d) \(76,22-x=38,08\)
\(x=76,22-38,08\)
\(x=38,14\)
![](https://rs.olm.vn/images/avt/0.png?1311)
( 5,28 + x ) : 2,4 = 5,6
5,28 + x = 5,6 x 2,4
5,28 + x = 13,44
x = 13,44 - 5,28
x = 8,16
( 5,28 + x ) : 2,4 = 5,6
5,28 + x = 5,6 * 2,4
5,28 + x = 13,44
x = 13,44 - 5,28
x = 8,16
![](https://rs.olm.vn/images/avt/0.png?1311)
a: C1: \(\left(5,28+4,72\right)\cdot4,5\)
\(=10\cdot4,5\)
=45
C2: \(\left(5,28+4,72\right)\cdot4,5\)
\(=5,28\cdot4,5+4,72\cdot4,5\)
\(=23,76+21,24\)
=45
b: C1: \(\left(7,8-2,3\right)\cdot6,4\)
\(=5,5\cdot6,4\)
=35,2
C2: \(\left(7,8-2,3\right)\cdot6,4\)
\(=7,8\cdot6,4-2,3\cdot6,4\)
\(=49,92-14,72\)
=35,2
![](https://rs.olm.vn/images/avt/0.png?1311)
4,72 : 0,25 + 5,28 x 4
= 4,72 x 4 + 5,28 x 4
= ( 4,72 + 5,28 ) x 4
= 10 x 4
40
![](https://rs.olm.vn/images/avt/0.png?1311)
x = 19.19 - 5.28
x = 13.91
\(x+5,28=19,19\)
\(x=19,19-5,28\)
\(x=13,91\)