`2 / 9 - 7 / 8 x = 1 / 3`
`7 / 8 x = 2 / 9 - 1 / 3`
`7 / 8 x = 2 / 9 - 3 / 9`
`7 / 8 x = [-1] / 9`
`x = [-1] / 9 : 7 / 8`
`x = [-8] / 63`
Vậy `x = [-8] / 63`
\(\dfrac{7}{8}\)x = \(\dfrac{2}{9}\)- \(\dfrac{1}{3}\)
\(\dfrac{7}{8}\)x = \(\dfrac{-1}{9}\)
x = \(\dfrac{-1}{9}\): \(\dfrac{7}{8}\)
x = -8/63
\(\dfrac{2}{9}-\dfrac{7}{8}x=\dfrac{1}{3}\)
\(\dfrac{7}{8}x=\dfrac{2}{9}-\dfrac{1}{3}\)
\(\dfrac{7}{8}x=\dfrac{-1}{9}\)
\(x=\dfrac{-1}{9}:\dfrac{7}{8}\)
\(x=\dfrac{-8}{63}\)
`\frac{2}{9} - \frac{7}{8} x = \frac{1}{3}`
`\frac{7}{8} x = \frac{2}{9} - {1}{3}`
`\frac{7}{8} x = \frac{-1}{9}`
`x = \frac{-1}{9} : \frac{7}{8}`
`x = \frac{-8}{63}`