Помогите решить способом сложения, пример 3. Дам 15 балов

$\left \{ {{2x*4+\frac{x-y}{4}*4=11*4 } \atop {3y*3-\frac{x+y}{3}*3=1*3 }} \right.\\\\\left \{ {{8x+x-y=44} \atop {9y-x-y=3}} \right.\\\\\left \{ {{9x-y=44} \atop {-x+8y=3}|*9} \right.\\\\+\left \{ {{9x-y=44} \atop {-9x+72y=27}} \right.\\--------\\71y=71\\\\y=1\\\\-x+8*1=3\\\\x=8-3=5$

Ответ : (5 ; 1)