Question

Помогите с решением.............

Answer 1

Ответ:

$\left\{\begin{array}{l}4-x=1\\x+y-1=0\end{array}\right\ \ \left\{\begin{array}{l}x=4-1\\y=1-x\end{array}\right\ \ \left\{\begin{array}{l}x=3\\y=1-3\end{array}\right\ \ \left\{\begin{array}{l}x=3\\y=-2\end{array}\right\\\\\\Otvet:\ \ (3;-2)\ .$