Ta có : \(\frac{x}{6}-\frac{1}{y}=\frac{1}{2}\)
\(\frac{1}{y}=\frac{x}{6}-\frac{1}{2}\)
\(\frac{1}{y}=\frac{x}{6}-\frac{3}{6}\)
\(\frac{1}{y}=\frac{(x-3)}{6}\)
\(1\cdot6=y(x-3)\)
\(6=y(x-3)\)
\(\Rightarrow y(x-3)\)là Ư\((6)\). Ta có bảng như sau :
y | 1 | 2 | 3 | 6 | -1 | -2 | -3 | -6 |
x-3 | 6 | 3 | 2 | 1 | -6 | -3 | -2 | -1 |
x | 9 | 6 | 5 | 4 | -3 | 0 | 1 | 2 |