Write the Matrix Equation as a System of Linear Equations

Write the matrix equation as a system of linear equations without matrices.
- $\left[ \begin{array} { r r } 4 & 19 \\ 10 & 20 \end{array} \right] \left[ \begin{array} { l } x \\ y \end{array} \right] = \left[ \begin{array} { l } 3 \\ 3 \end{array} \right]$

A) $4 x + 19 y = 3$
$10 x + 20 y = 3$
B) $4 x + 19 y = - 3$
$10 x + 20 y = - 3$
C) $19 x + 4 y = 3$
$10 x + 20 y = 3$
D) $4 x + 19 y = 3$
$20 x + 10 y = 3$