Solve the system

$4x_1,-5x_2,+4x_3,+3x_4=,0$

$-x_1,+x_2,+3x_3,+3x_4=,2$

$3x_1,-4x_2,+7x_3,+6x_4=,2$

$-2x_1,+2x_2,+6x_3,+6x_4=,4$

$\left[\begin{array}{c}{x}_1\\ x_2\\ x_3\\ x_4\end{array}\right]=[]+s[-]+t[-]$