a)\(-\dfrac{2}{3}+1=-\dfrac{7}{9}\)
\(-\dfrac{2}{3}x=-\dfrac{7}{9}-1\)
\(-\dfrac{2}{3}x=-\dfrac{16}{9}\)
\(x=-\dfrac{16}{9}:-\dfrac{2}{3}\)
\(x=-\dfrac{16}{9}.-\dfrac{3}{2}\)
\(x=\dfrac{8}{3}\)
b)\(\left|x-\dfrac{5}{3}\right|=\dfrac{1}{2}\)
\(x-\dfrac{5}{6}=\dfrac{-1}{2}\) hoặc \(x-\dfrac{5}{6}=\dfrac{1}{2}\)
\(x=\dfrac{-1}{2}+\dfrac{5}{6}\) hoặc \(x=\dfrac{1}{2}+\dfrac{5}{6}\)
\(x=\dfrac{1}{3}\) hoặc \(x=\dfrac{4}{3}\)
c)\(\left|x+\dfrac{4}{9}\right|-\dfrac{1}{2}=\dfrac{3}{2}\)
\(\left|x+\dfrac{4}{9}\right|=\dfrac{3}{2}+\dfrac{1}{2}\)
\(\left|x+\dfrac{4}{9}\right|=2\)
\(x+\dfrac{4}{9}=2\) hoặc \(x+\dfrac{4}{9}=-2\)
\(x=2-\dfrac{4}{9}\) hoặc \(x=\left(-2\right)-\dfrac{4}{9}\)
\(x=\dfrac{14}{9}\) hoặc \(x=\dfrac{-22}{9}\)
a, \(-\dfrac{2}{3}x+1=-\dfrac{7}{9}\)
\(\dfrac{\left(-2\right)}{3}x=\dfrac{-7}{9}+\dfrac{-9}{9}\)
\(x=\dfrac{-16}{9}.\dfrac{-3}{2}=\dfrac{-8}{3}.\dfrac{-1}{1}\)
\(x=\dfrac{8}{3}\)