a) \(x-\dfrac{-1}{2}=\dfrac{-7}{8}\)
\(x=\dfrac{-7}{8}+\left(\dfrac{-1}{2}\right)\)
\(x=-\dfrac{7}{8}-\dfrac{1}{2}\)
\(x=-\dfrac{7}{8}-\dfrac{4}{8}\)
\(x=-\dfrac{11}{8}\)
b) \(x:\dfrac{4}{9}+\dfrac{2}{3}=\dfrac{1}{2}\)
\(x:\dfrac{4}{9}=\dfrac{1}{2}-\dfrac{2}{3}\)
\(x:\dfrac{4}{9}=\dfrac{3}{6}-\dfrac{4}{6}\)
\(x:\dfrac{4}{9}=-\dfrac{1}{6}\)
\(x=-\dfrac{1}{6}.\dfrac{4}{9}\)
\(x=-\dfrac{2}{27}\)
a: \(x-\dfrac{-1}{2}=\dfrac{-7}{8}\)
=>\(x=-\dfrac{7}{8}+\dfrac{-1}{2}=\dfrac{-7+\left(-4\right)}{8}=-\dfrac{11}{8}\)
b: \(x:\dfrac{4}{9}+\dfrac{2}{3}=\dfrac{1}{2}\)
=>\(x:\dfrac{4}{9}=\dfrac{1}{2}-\dfrac{2}{3}=\dfrac{3-4}{6}=\dfrac{-1}{6}\)
=>\(x=-\dfrac{1}{6}\cdot\dfrac{4}{9}=\dfrac{-4}{54}=-\dfrac{2}{27}\)
