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![](https://rs.olm.vn/images/avt/0.png?1311)
(10,6 + 7,19) : x = 3
17,79 : x = 3
x = 3 x 17,79
x = 53,37
7 : x = 5 + 3,9
7 : x = 8,9
x = 7 : 8,9
x = 0,78
![](https://rs.olm.vn/images/avt/0.png?1311)
1.106:6+101:6
=(106+101):6
=207:6
=34,5
2.100:9-79,3:9
=(100-79,3):9
=20,7:9
=2,3
3.10,6:x+7,19:x=3
(10,6+7,19):x=3
17,79:x=3
x=17,79:3
x=5,93
4.7:x-3,9:x=5
(7-3,9):x=5
3,1:x=5
x=3,1:5
x=0,62
cau 1=34,5
cau 2 =2,3
cau 3 =5,93
cầu 4 =0,62
CÁC BAN THẤY DÚNG K CHO MINH 1 K DI
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:0,25+6.x=12,81+7,19\)
\(x.4+6.x=20\)
\(x.\left(4+6\right)=20\)
\(x.10=20\)
\(x=20:10\)
\(x=2\)
~ Hok tốt ~
\(x:0,25+6\times x=12,81+7,19\)
\(\Leftrightarrow x:\frac{25}{100}+6\times x=20\)
\(\Leftrightarrow x:\frac{1}{4}+6\times x=20\)
\(\Leftrightarrow x\times4+6\times x=20\)
\(\Leftrightarrow x\times(4+6)=20\)
\(\Leftrightarrow x\times10=20\)
\(\Leftrightarrow x=20:10=2\)
Vậy x = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
( 10,6 + 7,19 ) : x = 3
= > x = 17,79 : x = 3
= > x = 17,79 : 3
= > x = 5,93
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a)10,6:x+7,19:x=3\\ \Rightarrow\left(10,6+7,19\right):x=3\\ \Rightarrow17,79:x=3\\ \Rightarrow x=17,79:3\\ \Rightarrow x=5,93\\ b)7:x-3,9:x=5\\ \Rightarrow\left(7-3,9\right):x=5\\ \Rightarrow3,1:x=5\\ \Rightarrow x=3,1:5\\ \Rightarrow x=0,62\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a,\(10:x+7,19:x=3\)
\(\left(10+7,19\right):x=3\)
\(17,19:x=3\)
\(\Rightarrow x=17,19:3\)
\(\Rightarrow x=5,73\)
Vậy x=5,73
b,\(6,24:x+1,26;x=10\)
\(\left(6,24+1,26\right):x=10\)
\(7,5:x=10\)
\(\Rightarrow x=7,5:10\)
Vậy x= 0,75
a) 10:x+7,19:x=3
\(\Rightarrow\)(10+7,19):x=3
\(\Rightarrow\)17,19:x=3
\(\Rightarrow\)x=17,19:3=5,73
b) 6,24:x+1,26:x=10
\(\Rightarrow\)(6,24+1,26):x=10
\(\Rightarrow\)7,5:x=10
\(\Rightarrow\)x=7,5:10=0,75
![](https://rs.olm.vn/images/avt/0.png?1311)
10,6 : x + 7,19 : x =3
(10,6 + 7,19) : x = 3
17,79 : x = 3
x = 17,79 : 3
x = 5,93
7 : x - 3,9 : x = 5
(7 - 3,9) : x = 5
3,1 : x = 5
x = 3,1 : 5
x = 0,62
Tìm x , biết :
10,6 : x + 7,19 : x = 3
(10,6 + 7,19) : x = 3
17,79 : x = 3
x = 17,79 : 3
x = 5,93
7 : x - 3,9 : x = 5
(7 - 3,9) : x = 5
3,1 : x = 5
x = 3,1 : 5
x = 0,62
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 10,6 : x + 7,19 : x =3
x : ( 10,6 + 7,19) = 3
x : 17,79 = 3
x = 3 x 17,19
x = 53,37
b) 7 : x - 3,9 :x = 5
x: ( 7-3,9) = 5
x : 3,1 = 5
x = 5 x 3,1
x = 15,5
( k cho mình nhé)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) (10,6+7,19):x=3
=> 17,79:x=3
=> x=17,79:3
=> x=5,93
b) 7:x-3,9:x=5
=> (7-3,9):x=5
=> 3,1:x=5
=> x=3,1:5
=> x=0,62
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,10,6:x+7,19:x=3\)
\(\Rightarrow\left(10,6+7,19\right):x=3\)
\(\Rightarrow17,79:x=3\)
\(\Rightarrow x=17,79:3=5,93\)
Bài làm
a) 10,6 : x + 7,19 : x = 3 b) 7 : x -3,9 : x = 5
( 10,6 + 7,19 ) : x = 3 ( 7 - 3,9 ) : x = 5
17,79 : x = 3 3,1 : x = 5
x = 17,79 : 3 x = 3,1 : 5
x = 5,93 x = 0,62
# Chúc bạn học tốt #
10,6 : x + 7,19 : x = 3
(10,6 + 7,19) : x = 3
17,79 : x = 3
x = 17,79 : 3
x = 5,93