\(a,\dfrac{x}{25}=\dfrac{3}{5}\\ x=\dfrac{25.3}{5}=15\\ b,\dfrac{6}{x}=\dfrac{18}{39}\\ đkx\ne0\\ x=\dfrac{6.39}{18}=13\left(thoamanđk\right)\)
`x/25=3/5`
`=>x:25=3/5`
`=>x= 3/5 xx 25`
`=>x= 15`
`b)`
`6 : x= 18/39`
`=>x= 6 : 18/39`
`=>x= 6 xx 39/18`
`=>x= 13`
\(\dfrac{3}{5}=\dfrac{15}{25}=>x=15\)
\(\dfrac{18}{39}=\dfrac{6}{13}=>x=13\)
`x/25 = 3/5`
`x/25 = 15/25`
`=> x =15`
` 6/x = 18/39`
`18/(3xx x) = 18/39`
`=> 3xx x = 39`
`=> x =39/3 = 13`
Vậy `x=13`
\(a,\dfrac{x}{25}=\dfrac{3}{5}\)
\(\dfrac{x}{25}=\dfrac{15}{25}\)
\(\Rightarrow x=15\)
\(b,\dfrac{6}{x}=\dfrac{18}{39}\)
\(\dfrac{6}{x}=\dfrac{6}{13}\)
\(\Rightarrow x=13\)
