Solve for x, y, and z.

$\displaystyle{2}{x}-{y}+{3}{z}={10}\usepackage{cmbright}\Huge\$

$\displaystyle-{3}{x}+{y}-{2}{z}=-{11}\usepackage{cmbright}\Huge\$

$\displaystyle-{4}{x}+{y}-{4}{z}=-{15}\usepackage{cmbright}\Huge\$