Matrix

$A=\begin{bmatrix} 2 & 3 \\ 1 & 5 \end{bmatrix}$

$B=\begin{bmatrix} 4 & 3 & 6 \\ 1 & -2 & 3 \end{bmatrix}$

Equaltion

$\begin{cases}2\times\left( 4t_{1}+3t_{2}+6t_{3}\right) +3\left( t_{i}-2t_{2}+3t_{3}\right) =a_{1}\\4t_{1}+3t_{2}+6t_{3}+5\times\left( t_{1}-2t_{2}+3t_{3}\right) =a_{2}\end{cases}$

Text

$\overline{R_D}$

$\underline{R_D}$