Solve the system of linear equations. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION. If the system has an infinite number of solutions, express $x_1$, $x_2$, and $x_3$ in terms of the parameter $t$.)
$2x_1 + x_2 - 2x_3 = 7$
$4x_1 + 2x_3 = 16$
$-2x_1 + 5x_2 - 16x_3 = -13$
$(x_1, x_2, x_3) = (x_1, 23 - 6x_1, 8 - 2x_1)$