Tìm x , biết: c) − 8/9 − x = − 11/18 .
Giải thích
c) \[\frac{{ - 8}}{9} - x = \frac{{ - 11}}{{18}}\].
\[x = \frac{{ - 8}}{9} - \frac{{ - 11}}{{18}}\]
\[x = \frac{{ - 8}}{9} + \frac{{11}}{{18}}\]
\[x = \frac{{ - 16}}{{18}} + \frac{{11}}{{18}}\]
\[x = \frac{{ - 5}}{{18}}\].
Vậy \[x = \frac{{ - 5}}{{18}}.\]