Consider the following vector equation.

$$x_1 \left[{\begin{matrix} 2 \cr 5 \cr 2 \cr \end{matrix}}\right] + x_2 \left[{\begin{matrix} 1 \cr 9 \cr -2 \cr \end{matrix}}\right] = \left[{\begin{matrix} -6 \cr 1 \cr 6 \cr \end{matrix}}\right].$$

Express the vector equation as a system of linear equations. (Order your equations from the top.)

The first equation is $x_1+$ $x_2$ .

The second equation is $x_1+$ $x_2$ .

The third equation is $x_1+$ $x_2$ .