Tìm x, biết: -21/13 * x + 1/3 = -2/3

$$\begin{gathered} \mathrm{Tìm} \mathrm{x} \mathrm{biết} \frac{-21}{13}\mathrm{x} + \frac{1}{3} =\frac{-2}{3} \\ \mathrm{aio} \mathrm{nhanh} 5\mathrm{đ}😇 \end{gathered}$$