Is this is row echelon form?

Solve the linear system...

Im not sure how to do it because of the zeros on the bottom row, or is that the problem and therefore the system cannot be solved?

$\displaystyle

\begin{bmatrix}

1 & -3 & 8 \\0 & 1 & 0 \\0 & 0 & 1

\end{bmatrix}

$

Many thanks