Question

giải hộ mik với ạ

a)\(\frac{3}{4}\)-x=\(\frac{1}{2}\)

b)/x+\(\frac{2}{3}\)/=\(\frac{5}{6}\)

giúp mik với ạ

Answer 1

a, \(\frac{3}{4}-x=\frac{1}{2}\Leftrightarrow x=\frac{3}{4}-\frac{1}{2}=\frac{1}{4}\)Vậy \(x=\frac{1}{4}\)

b, \(\left|x+\frac{2}{3}\right|=\frac{5}{6}\)

TH1 : \(x+\frac{2}{3}=\frac{5}{6}\Leftrightarrow x=\frac{5}{6}-\frac{2}{3}=\frac{1}{6}\)

TH2 : \(x+\frac{2}{3}=-\frac{5}{6}\Leftrightarrow x=-\frac{5}{6}-\frac{2}{3}=\frac{-9}{6}=\frac{-3}{2}\)

Vậy \(x=\left\{\frac{1}{6};-\frac{3}{2}\right\}\)

Answer 2

a,\(\frac{3}{4}-x=\frac{1}{2}\)

\(\Leftrightarrow x=\frac{3}{4}-\frac{1}{2}\)

\(\Leftrightarrow x=\frac{1}{4}\)

b,\(\left|x+\frac{2}{3}\right|=\frac{5}{6}\)

\(\Leftrightarrow x+\frac{2}{3}=\pm\frac{5}{6}\)

TH₁:\(x+\frac{2}{3}=\frac{5}{6}\)

\(\Leftrightarrow x=\frac{5}{6}-\frac{2}{3}\)

\(\Leftrightarrow x=\frac{1}{6}\)

TH₂:\(x+\frac{2}{3}=-\frac{5}{6}\)

\(\Leftrightarrow x=-\frac{5}{6}-\frac{2}{3}\)

\(\Leftrightarrow x=-\frac{3}{2}\)