[tex]\displaystyle\bf\\ + \left \{ {{x - y = 4} \atop {2x + y = 2 }} \right. \\ \\ x + 2x = 4 + 2 \\ 3x = 6 \\ x = 6 \div 3 \\ x = 2 \\ \\ 2 - y = 4 \\ y = 2 - 4 \\ y = - 2 [/tex]

Ответ: ( 2 ; - 2 )