I'm doing homework and checking my answers with the appendices in the back of our textbook. I have this matrix that I'm supposed to turn into an elementary matrix:

$\displaystyle \begin{bmatrix}1 & 0 & 4 \\0 & 1 & 0 \\ 0 & 0 & 1 \end{bmatrix}$

The book says 4R3 + R1 -> R1, but doesn't make into a elementary matrix. Shouldn't it be -4R3 + R1 -> R1?