Question

Помогите решит пожалуйста даю 20 баллов​

Answer 1

Ответ:

$\left \{ {{\frac{2}{7}x-\frac{3}{14}y-\frac{1}{7}=0, } \atop {x+y-4=0;}} \right. \\\left \{ {{\frac{2}{7}x-\frac{3}{14}y-\frac{1}{7}=0 } \atop {x=-y+4}} \right. \\\frac{2}{7} *(-y+4)-\frac{3}{14}y-\frac{1}{7}=0\\y=2\\x=-2+4\\x=2\\(x,y)=(2,2)\\\left \{ {{\frac{2}{7}*2-\frac{3}{14}*2-\frac{1}{7}=0 } \atop {2+2-4=0}} \\\right. \\\left \{ {{0=0} \atop {0=0}} \right. \\(x,y)=(2,2)$