Bài 2 :
a) \(\left(\dfrac{1}{2}-x\right).\dfrac{2}{3}=\dfrac{1}{8}\)
\(\Leftrightarrow\dfrac{1}{2}-x=\dfrac{3}{16}\)
\(\Leftrightarrow-x=\dfrac{-5}{16}\)
\(\Leftrightarrow x=\dfrac{5}{16}\)
Vậy \(x=\dfrac{5}{16}\)
b) \(3,2x-9,854=-1,246\)
\(\Leftrightarrow3,2x=8,608\)
\(\Leftrightarrow x=2,69\)
Vậy x= 2,69
a) \(\left(\dfrac{1}{2}-x\right)\cdot\dfrac{2}{3}=\dfrac{1}{8}\)
\(\left(\dfrac{1}{2}-x\right)=\dfrac{1}{8}\div\dfrac{2}{3}\)
\(\dfrac{1}{2}-x=\dfrac{3}{16}\)
\(x=\dfrac{1}{2}-\dfrac{3}{16}\)
\(x=\dfrac{5}{16}\)
b) \(3,2\cdot x-9,854=-1,246\)
\(3,2\cdot x=\left(-1,246+9,854\right)\)
\(3,2\cdot x=8.608\)
\(x=8,608\div3,2\)
\(x=2,69\)
