Решите систему: 2х+y=7 |x-y|=2
2x+y=7 = x=2-y /x-y/=2 = 2 (2+y)+y=7 2 (2-y)+y=7 4-2y+y=7 -y=7-4 -y=3 y=3 x=2-(-3)=-5