Ответ:
(x;y)=(32; 24)
Пошаговое объяснение:
\left \{ {{y=88-2x} \atop {x+2y=80}} \right.\\\\ x+2(88-2x)=80\\x+176-4x=80\\x-4x=80-176\\-3x=-96\\3x=96\\x=96:3\\x=32\\\\32+2y=80\\2y=80-32\\2y=48\\y=48:2\\y=24" alt="\left \{ {{2x+y=88} \atop {x+2y=80}} \right.=>\left \{ {{y=88-2x} \atop {x+2y=80}} \right.\\\\ x+2(88-2x)=80\\x+176-4x=80\\x-4x=80-176\\-3x=-96\\3x=96\\x=96:3\\x=32\\\\32+2y=80\\2y=80-32\\2y=48\\y=48:2\\y=24" align="absmiddle" class="latex-formula">