Tìm x , biết: b) x − 4/5 = 2/3 .
Giải thích
b) \[x - \frac{4}{5} = \frac{2}{3}\].
\[x = \frac{2}{3} + \frac{4}{5}\]
\[x = \frac{{10}}{{15}} + \frac{{12}}{{15}}\]
\[x = \frac{{22}}{{15}}\]
Vậy \[x = \frac{{22}}{5}.\]
b) \[x - \frac{4}{5} = \frac{2}{3}\].
\[x = \frac{2}{3} + \frac{4}{5}\]
\[x = \frac{{10}}{{15}} + \frac{{12}}{{15}}\]
\[x = \frac{{22}}{{15}}\]
Vậy \[x = \frac{{22}}{5}.\]