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![](https://rs.olm.vn/images/avt/0.png?1311)
a) 96- (y : 3,75) = 94,5
y:3,75 = 96 - 94,5
y: 3,75 = 1,5
y = 1,5 x 3,75
y = 5,625
a) 96- (y : 3,75) = 94,5
y:3,75=96-94,5
y:3,75=1,5
y=1,5 . 3,75
y=5,625=45/8
![](https://rs.olm.vn/images/avt/0.png?1311)
96 : ( 3,75 : x ) = 94,5
3,75 : x = 96 : 94,5
3,75 : x = \(\frac{96}{94,5}\)
x = 3,75 : \(\frac{96}{94,5}\)
x = \(\frac{354,375}{96}\)
\(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{x}\left(3+x\right)=\frac{6}{13}\)
\(\Rightarrow\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{3+x}{x}=\frac{6}{13}\)
\(\Rightarrow\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+1+\frac{3}{x}=\frac{6}{13}\)
\(\Rightarrow\frac{3}{x}+\frac{8}{5}=\frac{6}{13}\)
\(\Rightarrow\frac{3}{x}=-\frac{74}{65}\)
\(\Rightarrow-74x=195\)
\(\Rightarrow x=\frac{-195}{74}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
3, 16:(x. 0,4)= 7,9
=> x. 0,4= 3,16:7,9= 0,4
=> x = 0,4 : 0,4 = 1
Vậy x= 1
![](https://rs.olm.vn/images/avt/0.png?1311)
96 - (3,75 : x) = 94,5
3,75 : x = 96 - 94,5
3,75 : x = 1,5
x = 3,75 : 1,5
x = 2,5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(x-21.13\right):11=30\)
\(\left(x-273\right)=30.11\)
\(x-273=330\)
\(x=330+273\)
\(x=603\)
vậy \(x=603\)
\(\left(627-138\right):\left(x:2\right)=163\)
\(489:\frac{x}{2}=163\)
\(\frac{x}{2}=489:163\)
\(\frac{x}{2}=3\)
\(\Rightarrow x=6\)
vậy \(x=6\)
học tốt Trần Bích Ngọc
Tìm x :
(x - 21*13) : 11 = 30
(627 - 56,5) : (x: 2) = 163
2/3 + 1/3 : x = 1
165 - (35 : x + 3) * 15 = 15
![](https://rs.olm.vn/images/avt/0.png?1311)
a, ( x - 21 . 13 ) : 11 = 30
x - 273 = 30 . 11
x - 273 = 330
x = 330 + 273
x = 603
b, ( 627 - 56,5 ) : ( x : 2 ) = 163
570,5 : ( x : 2 ) = 163
x : 2 = 570,5 : 163
x : 2 = 3,5
x = 3,5 . 2
x = 7
c, 2/3 + 1/3 : x = 1
1/3 : x = 1 - 2/3
1/3 : x = 1/3
x = 1/3 : 1/3
x = 1
d, 165 - ( 35 : x + 3 ) . 15 = 15
165 - ( 35 : x + 3 ) = 15 : 15
165 - ( 35 : x + 3 ) = 1
35 : x + 3 = 165 - 1
35 : x + 3 = 164
35 : x = 164 - 3
35 : x = 161
x = 35 : 161
x = 5/23
Mk tính nhẩm nên chắc có chỗ sai nên bn cứ kiểm tra lại nha
![](https://rs.olm.vn/images/avt/0.png?1311)
(y-21x13):11=30
y-273=30x11
y-273=330
y=330+273
y=603
MIK NHANH NHAT!
![](https://rs.olm.vn/images/avt/0.png?1311)
(x - 21 x 13) : 11 = 30
=> x - 273 = 330
=> x = 603
vậy_
(627 - 138) : (x : 2) = 163
=> 489 : (x : 2) = 163
=> x : 2 = 3
=> x = 6
vậy_
\(\left(x-21.13\right):11=30\)
\(\left(x-273\right):11=30\)
\(\left(x-273\right)=30.11=330\)
\(x=330+273\)
\(x=603\)
a, ( y - 21 x 13 ) : 11 = 30
y - 273 = 30 x 11
y - 273 = 330
y = 330 + 273
y = 603
b, ( 627 - 138 ) : ( y : 2 ) = 163
489 : ( y : 2 ) = 163
y : 2 = 489 : 163
y : 2 = 3
y = 3 x 2 =6
c. 96 - ( 3,75 : y ) = 94,5
3,75 : y = 96 - 94,5
3,75 : y = 1,5
y = 3,75 : 1,5 = 2,5
d, 3,16 : ( y x 0,4 ) = 7,9
y x 0,4 = 3,16 : 7,9 = 0,4
y = 0,4 : 0,4 = 1
thanks Nguyễn Thị Ngọc Ánh
:) ^.^ (: ^_^:)