a) \(x:\frac{1}{2}=4\)

\(x=4\times\frac{1}{2}\)

\(x=2\)

b)\(x\times\frac{3}{5}=15\)

\(x=15:\frac{3}{5}\)

\(x=25\)

a) \(\text{X}\div\frac{1}{2}=4\)

\(\text{X}=4\times\frac{1}{2}\)

\(\text{X}=2\)

b) \(\text{X}\times\frac{3}{5}=15\)

\(\text{X}=15\div\frac{3}{5}\)

\(\text{X}=25\)

Giải đáp

a) x = 4 x 1/2

x = 2

b) x = 15 : 3/5

x = 75/3

x = 25
Học tốt

a)x=9.1875

b)x=3.2

c)x=2.75

d)x=30.682

X : 0,1 - X : 4 - X x 3 / 4 = 2 , 25

X x 10 - X x 1 / 4 - X x 3 / 4 = 2 , 25

X ( 10 - 1 / 4 - 3 / 4 ) = 2 , 25

X x 9                         = 2 , 25

X                               = 0 , 25

X x 3+ X : 4 =26

X x 3 + X x 1/4 = 26

X x ( 3 + 1/4 ) = 26 

X x 13/4 = 26

X = 26 : 13/4 

X = 8

\(x\) \(\times\) 3 + \(\dfrac{x}{4}\) = 26 

\(x\times3+x\times\dfrac{1}{4}\)=26 

\(x\times\left(3+\dfrac{1}{4}\right)\) = 26

\(x\times\dfrac{13}{4}\) = 26

\(x=26:\dfrac{13}{4}\)

\(x=8\)

$x\times\dfrac{3}{7}=1-\dfrac{5}{8}$

$=>x\times\dfrac{3}{7}=\dfrac{3}{8}$

$=>x=\dfrac{3}{8}:\dfrac{3}{7}$

$=>x=\dfrac{7}{8}$

tk mình nha

118,24-(X:5+Xx3)=54,24

118,24-x:(5+1/3)=54,24

118,24-x:16/3=54,24

x:16/3=64

x=1024/3

Vậy x=1024/3

\(118,24-\left(x:5+x.3\right)=54,24\)

\(\Rightarrow118,24-\left(x.0,2+x.3\right)=54,24\)

\(\Rightarrow118,24-\left[x.\left(0,2+3\right)\right]=54,24\)

\(\Rightarrow118,24-3,2x=54,24\)

\(\Rightarrow3,2x=118,24-54,24\)

\(\Rightarrow3,2x=64\)

\(\Rightarrow x=64:3,2\)

\(\Rightarrow x=20\)

Vậy x=20

Chúc bn học tốt 

118,24 - \(x\times\frac{1}{5}\)+ \(x\times3\)= 54,24

\(x\times\frac{1}{5}\)+ 3                           = 54,24

\(x\times\frac{16}{5}\)                             = 64

\(x\)                                            = 64 : \(\frac{16}{5}\)

\(x\)                                            = 20

bn vào tài khoản của bạn trong Bingbe rồi ấn vào chỉnh sửa tên rồi bn ghi team bn vần muốn

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1/2 + X x 3/4 = 2

X x 3/4 = 2 - 1/2

X x 3/4 = 3/2

X = 3/2 : 3/4

X = 1/2

1/2+x*3/4=2

1/2+x=2*4/3

1/2+x=8/3

x=8/3-1/2=16/6-3/6

x=13/6

1/2 + X x 3/4 = 2

X x 3/4          = 2 - 1/2 

X x 3/4          = 3/2

       X           = 3/2 : 3/4

       X           = 2