\(a,8:\left(\dfrac{1}{4}x\right)=2:0,02\)
\(8:\left(\dfrac{1}{4}x\right)=100\)
\(\dfrac{1}{4}x=100.8\)
\(\dfrac{1}{4}x=800\)
\(\Rightarrow x=...\)
\(b,\dfrac{21}{4}=\dfrac{3}{4}:\left(6.x\right)\)
\(\dfrac{21}{4}.\dfrac{3}{4}=6.x\)
\(\dfrac{64}{16}=6.x\)
\(\dfrac{64}{16}:6=x\)
\(\Rightarrow x=...\)
a: Ta có: \(8:\left(\dfrac{1}{4}x\right)=2:0.02\)
\(\Leftrightarrow x\cdot\dfrac{1}{4}=\dfrac{8}{100}=\dfrac{2}{25}\)
hay \(x=\dfrac{2}{25}:\dfrac{1}{4}=\dfrac{8}{25}\)
b: Ta có: \(3:2\dfrac{1}{4}=\dfrac{3}{4}:\left(6x\right)\)
\(\Leftrightarrow\dfrac{3}{4}:6x=3:\dfrac{9}{4}=3\cdot\dfrac{4}{9}=\dfrac{4}{3}\)
\(\Leftrightarrow6x=\dfrac{3}{4}:\dfrac{4}{3}=\dfrac{9}{16}\)
hay \(x=\dfrac{3}{32}\)
