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a) \(3,8:\left(2x\right)=\frac{1}{4}:\frac{8}{3}\)
\(=3,8:\left(2x\right)=\frac{3}{32}\)
\(\Rightarrow2x=3,8:\frac{3}{32}=\frac{608}{15}\)
\(\Rightarrow x=\frac{608}{15}:2=\frac{304}{15}\)
b) Yêu cầu j vậy pn?
\(3,8:\left(2x\right)=\frac{1}{4}:\frac{8}{3}\)
\(\Rightarrow2x=\frac{608}{15}\)
\(\Rightarrow x=\frac{304}{15}\)
\(2x:6=5:3\) \(-\frac{2}{x}=-\frac{x}{8}\)
\(\Rightarrow2x:6=\frac{5}{3}\) \(\Rightarrow-2\times8=x\times\left(-x\right)\)
\(\Rightarrow2x=\frac{5}{3}\times6\) \(\Rightarrow-16=\left(-x\right)^2\)
\(\Rightarrow2x=10\) \(\Rightarrow\left(-4\right)^2=\left(-x\right)^2\)
\(\Rightarrow x=5\) \(\Rightarrow x=-4\)
b) \(3,8:\left(2x\right)=\frac{1}{4}:\frac{8}{3}\)
= \(3,8:\left(2x\right)=\frac{3}{32}\)
\(\Rightarrow2x=3,8:\frac{3}{32}=\frac{608}{15}\)
\(\Rightarrow x\frac{608}{15}:2=\frac{304}{15}\)
\(\Rightarrow\frac{304}{15}\)
a) 0,01 : 25 = ( 0,75 . x ) : 0,75
\(\Rightarrow\frac{1}{2500}=0,75\cdot x:0,75\)
\(\Rightarrow x=\frac{1}{2500}\)
b) \(\left(3,8\right):\left(2x\right)=\frac{1}{4}:\frac{8}{3}\)
\(\Rightarrow3,8:\left(2x\right)=\frac{3}{32}\)
\(\Rightarrow2x=3,8:\frac{3}{32}=\frac{608}{15}\)
\(\Rightarrow x=\frac{608}{15}:2=\frac{304}{15}\)
( 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
\(3,8:2x=\frac{1}{4}:\frac{8}{3}\)
\(3,8:2x=\frac{1}{4}\cdot\frac{3}{8}\)
\(3,8:2x=\frac{3}{32}\)
\(2x=3,8:\frac{3}{32}\)
\(2x=\frac{19}{5}\cdot\frac{32}{3}\)