Решите симтему уровнений: x+9/3-y-8/6=3 x+11/7+y+6/2=4

$\left \{ {{ \frac{x+9}{3}- \frac{y-8}{6} =3|*6} \atop { \frac{x+11}{7} + \frac{y+6}{2} =4|*14}} \right.\\ \left \{ {{2 (x+9)- (y-8)} =18} \atop { 2(x+11)+ 7(y+6) =56}} \right.\\ \left \{ {{2x+18-y+8=18} \atop {2x+22+7y+42=56}} \right. \\ \left \{ {{2x-y=-8} \atop {2x+7y=-8}} \right. \\ 8y=0\\ y=0\\ 2x-y=-8\\ 2x=-8\\ x=-8:2 x=-4$
Ответ: (-4;0).