Tìm x , biết: d) x − 2/3 = − 5/12 .
Giải thích
d) \[x - \frac{2}{3} = \frac{{ - 5}}{{12}}\].
\[x = \frac{{ - 5}}{{12}} + \frac{2}{3}\]
\[x = \frac{{ - 5}}{{12}} + \frac{8}{{12}}\]
\[x = \frac{3}{{12}} = \frac{1}{4}\].
Vậy \[x = \frac{1}{4}.\]
d) \[x - \frac{2}{3} = \frac{{ - 5}}{{12}}\].
\[x = \frac{{ - 5}}{{12}} + \frac{2}{3}\]
\[x = \frac{{ - 5}}{{12}} + \frac{8}{{12}}\]
\[x = \frac{3}{{12}} = \frac{1}{4}\].
Vậy \[x = \frac{1}{4}.\]