`1/5 x : 3 = 2/3 : 0,25`
`1/5 x : 3 = 2/3 : 1/4`
`1/5 x : 3 = 2/3 xx 4`
`1/5 x : 3 = 8/3`
`1/5 x= 8/3 xx 3`
`1/5 x = 8`
`x = 8 : 1/5`
`x = 8 xx 5`
`x = 40`
`1/5 x : 3 = 2/3 : 0,25`
`1/5 x : 3 = 2/3 : 1/4`
`1/5 x : 3 = 8/3`
`1/5 x= 8/3 xx 3`
`1/5 x = (8xx3)/(3xx1)`
`1/5 x = 8`
`x = 8 : 1/5`
`x = 8 xx 5`
`x = 40`
Vậy `x = 40`\(\dfrac{1}{5}\)x\(:3=\dfrac{2}{3}:0,25\)
\(\dfrac{1}{5}\)x\(:3\)\(=\dfrac{2}{3}:\dfrac{1}{4}\)
\(\dfrac{1}{5}\)x\(:3=\dfrac{8}{3}\)
\(\dfrac{1}{5}\)x\(=\dfrac{8}{3}x3\)
\(\dfrac{1}{5}\)x\(=8\)
x = \(8:\dfrac{1}{5}\)
x = 40
vậy x = 40