Bạn tham khảo!
$d)$ $($ $x$ $+$ $\dfrac{1}{2}$ $)$ $.$ $($ $\dfrac{-2}{3}$ $)$ $=$ $\dfrac{-2}{3}$
$→$ $x$ $+$ $\dfrac{1}{2}$ $=$ $1$
$→$ $x$ $=$ $\dfrac{1}{2}$
$e)$ $|$ $3x$ $-$ $\dfrac{1}{2}$ $|$ $=$ $0$
$→$ $3x$ $-$ $\dfrac{1}{2}$ $=$ $0$
$→$ $3x$ $=$ $\dfrac{1}{2}$
$→$ $x$ $=$ $\dfrac{1}{6}$
$f)$ $|$ $\dfrac{1}{2}$ $x$ $+$ $\dfrac{2}{3}$ $|$ $=$ $\dfrac{4}{5}$
$→$ $\dfrac{1}{2}$ $x$ $+$ $\dfrac{2}{3}$ $=$ $\dfrac{4}{5}$ hoặc $\dfrac{1}{2}$ $x$ $+$ $\dfrac{2}{3}$ $=$ $\dfrac{-4}{5}$
$→$ $\dfrac{1}{2}$ $x$ $=$ $\dfrac{2}{15}$ hoặc $\dfrac{1}{2}$ $x$ $=$ $\dfrac{-22}{15}$
$→$ $x$ $=$ $\dfrac{4}{15}$ hoặc $x$ $=$ $\dfrac{-44}{15}$
$FbBinhne2k88$
