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( 0,25x ) : 3 = 5/6 : 0,125

( 1/4x ) : 3 = 5/6 : 1/8

( 1/4x ) : 3 = 5/6 x 8

( 1/4x ) : 3 = 20/3

1/4x          = 20/3 x 3

1/4x         = 20

x              = 20 : 1/4

x              = 80

0,01 : 2,5 = ( 0,75x ) : 0,75

1/100 : 25/10 = (3/4x) : 3/4

1/100 x 10/25 = (3/4x) : 3/4

=>(3/4x) : 3/4 = 1/250

3/4x                = 1/250 x 3/4

3/4x                = 3/1000

x                     = 3/1000 : 3/4

x                     = 1/250

 4/3 : 0,8 = 2/3 : ( 0,1x )

<=>2/3 : (0,1x) = 4/3 : 0,8

2/3 : (0,1x) = 4/3 : 4/5

2/3 : (0,1x) = 4/3 x 5/4

2/3 : (0,1x) = 5/3

2/3 : (1/10x) = 5/3

1/10x           = 2/3 : 5/3

1/10x           = 2/3 x 3/5

1/10x           = 2/5

x                  = 2/5 : 1/10

x                  = 2/5 x 10

x                  = 4

a) \(\left(0,25x\right):3=\frac{5}{6}:0,125\)

\(\Leftrightarrow0,25x=\frac{20}{3}.3\)

\(\Leftrightarrow x=80\)

b) \(0,01:2,5=\left(0,75x\right):0,75\)

\(\Leftrightarrow x=\frac{1}{250}\)

a, \(\frac{0,25x}{3}=\frac{5}{6:0,125}\Leftrightarrow\frac{0,25x}{3}=\frac{5}{48}\Leftrightarrow12x=15\Leftrightarrow x=\frac{5}{4}\)

b, \(\frac{0,01}{2,5}=\frac{0,75x}{0,75}\Leftrightarrow\frac{3}{400}=\frac{15}{8}x\Leftrightarrow x=\frac{1}{250}\)

\(\left(0,25x\right):3=\frac{5}{6}:0,125\)

=> \(0,25x=\frac{3\cdot\frac{5}{6}}{0,125}=\frac{3\cdot\frac{5}{6}}{\frac{1}{8}}=\frac{5}{2}:\frac{1}{8}=\frac{5}{2}\cdot8=20\)

=> \(x=20:0,25=80\)

Vậy x = 80

b) \(0,01:2,5=\left(0,75x\right):0,75\)

=> \(0,75x=\frac{0,75\cdot0,01}{2,5}=\frac{\frac{3}{4}\cdot\frac{1}{100}}{\frac{5}{2}}=\frac{3}{400}:\frac{5}{2}=\frac{3}{400}\cdot\frac{2}{5}=\frac{3}{1000}\)

=> \(x=\frac{3}{1000}:0,75=\frac{3}{1000}:\frac{3}{4}=\frac{3}{1000}\cdot\frac{4}{3}=\frac{1}{250}\)

Vậy x = 1/250

a) \(\left(\dfrac{1}{4}x\right):3=\dfrac{5}{6}:\dfrac{1}{8}\\ \left(\dfrac{1}{4}x\right):3=\dfrac{20}{3}\\ \dfrac{1}{4}x=\dfrac{20.3}{3}\\ \dfrac{1}{4}x=20\\ x=80\)

a: Ta có: \(\dfrac{0.25x}{3}=\dfrac{5.6}{0.125}\)

\(\Leftrightarrow x\cdot\dfrac{1}{4}=134.4\)

hay x=537,6

b: Ta có: \(\dfrac{2.5}{7.5}=x:\dfrac{3}{5}\)

\(\Leftrightarrow x:\dfrac{3}{5}=\dfrac{1}{3}\)

hay \(x=\dfrac{1}{5}\)

\(\dfrac{5}{2}:\dfrac{15}{2}=x:\dfrac{7}{5}\\ x:\dfrac{7}{5}=\dfrac{1}{3}\\ x=\dfrac{7}{15}\)

a)x:8,5=0,69:(-1,15)

(=)x:8,5=-0,6

(=)x=-0,6.8,5

(=)x=-5,1

Vậy x=-5,1

b) (0,25x):3=4/5:0,125

(=)(0,25x):3=6,4

(=)0,25x=6,4.3

(=)0,25x=19,2

(=)x=19,2:0,25

(=)x=76,8

Vậy x=76,8

a,\(x:8,5=0,69\)

\(x=0,69.8,5\)

\(x=5,865\)

b,\(\left(0,25x\right):3=\dfrac{4}{5}:0,125\)

\(0,25x:3=6,4\)

\(0,25x=19,2\)

\(x=76,8\)

a, x: 8,5 = 0,69 : (-1,15)

=\(\dfrac{x}{8,5}\)=\(\dfrac{0,69}{-1,15}\)

\(\Rightarrow\)x= \(\dfrac{8,5\cdot0,69}{-1,15}\)=-5,1

b,(0,25x):3=\(\dfrac{4}{5}\): 0,125

=\(\dfrac{0,25x}{3}\)=\(\dfrac{32}{5}\)

\(\Rightarrow\)0,25x=\(\dfrac{3\cdot32}{5}\)=\(\dfrac{96}{5}\)

\(\Rightarrow\)x=\(\dfrac{96}{5}\): 0,25 =76,8

a)\(3,8:\left(2x\right)=\dfrac{1}{4}:2\dfrac{2}{3}\)

\(2x=3,8:\dfrac{3}{32}\)

\(x=\dfrac{608}{15}:2\)

\(x=\dfrac{304}{15}\)

b)\(\left(0,25x\right):3=\dfrac{5}{6}:0,125\)

\(0,25x=\dfrac{20}{3}\times3\)

\(x=20:0,25\)

\(x=80\)

c) \(0,01:2,5=\left(0,75\times x\right):0,75\)

\(0,004=0,75\times x:0,75\)

\(0,004=x\times0,75:0,75\)

\(0,004=x\times1\)

\(0,004=x\)

\(\Rightarrow x=0,004\)

d)\(1\dfrac{1}{3}:0,8=\dfrac{2}{3}:\left(0,1x\right)\)

\(\dfrac{5}{3}=\dfrac{2}{3}:0,1\times x\)

\(\dfrac{5}{3}=\dfrac{20}{3}\times x\)

\(\Rightarrow x=\dfrac{20}{3}:\dfrac{5}{3}\)

\(x=4\)

a) \(x=20\dfrac{4}{15}.\)

b) \(x=80\)

c) \(x=0,004\)

d) \(x=4.\)

a) Lm r nkoa!

b) \(\left(0,25x\right):3=\frac{5}{6}:0,125\)

\(=\left(0,25x\right):3=\frac{20}{3}\)

\(\Rightarrow0,25x=\frac{20}{3}\cdot3=20\)

\(\Rightarrow x=20:0,25=80\)

\(\Rightarrow x=80\)

c) \(0,01:2,5=\left(0,75x\right):0,75\)

\(=\frac{1}{250}=\left(0,75x\right):0,75\)

\(\Rightarrow0,75x=\frac{1}{250}\cdot0,75=\frac{3}{1000}\)

\(\Rightarrow x=\frac{3}{1000}:0,75=\frac{1}{250}\)

\(\Rightarrow x=\frac{1}{250}\)

d) \(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,1x\right)\)

\(=\frac{5}{3}=\frac{2}{3}:\left(0,1x\right)\)

\(\Rightarrow0,1x=\frac{2}{3}:\frac{5}{3}=\frac{2}{5}\)

\(\Rightarrow x=\frac{2}{5}:0,1=4\)

\(\Rightarrow4\)

a: \(\Leftrightarrow2x=\dfrac{19}{5}:\dfrac{3}{32}=\dfrac{608}{15}\)

hay x=304/15

b: \(\Leftrightarrow0.25x=20\)

hay x=80

c: \(\Leftrightarrow x=\dfrac{1}{100}:\dfrac{5}{2}=\dfrac{2}{500}=\dfrac{1}{250}\)

d: \(\Leftrightarrow0.1x=\dfrac{2}{3}:\dfrac{5}{3}=\dfrac{2}{5}\)

hay \(x=\dfrac{2}{5}:\dfrac{1}{10}=\dfrac{20}{5}=4\)