a. \(13\dfrac{1}{3}:1\dfrac{1}{3}=20:\left(2x-1\right)\)
\(\Leftrightarrow20:\left(2x-1\right)=13\dfrac{1}{3}:1\dfrac{1}{3}\)
\(\Rightarrow20:\left(2x-1\right)=10\)
\(\Rightarrow2x-1=20:10=2\)
\(\Rightarrow2x=2+1=3\)
\(\Rightarrow x=3:2=\dfrac{3}{2}\)
Vậy............
Tìm x:
a) \(13\dfrac{1}{3}\div1\dfrac{1}{3}=20\div\left(2x-1\right)\)
\(\Leftrightarrow20\div\left(2x-1\right)=10\)
\(\Leftrightarrow2x-1=2\)
\(\Leftrightarrow2x=3\)
\(\Leftrightarrow x=\dfrac{3}{2}\)
Vậy x=3/2
\(13\dfrac{1}{3}:1\dfrac{1}{3}=20:\left(2x-1\right)\)
=>13=20:(2x-1)
=>20:(2x-1)=13
=>2x-1=\(\dfrac{20}{13}\)
=>2x=\(\dfrac{33}{13}\)
=>x=\(\dfrac{33}{26}\)
