( х/2 ) + ( y/2 ) = 2
- ( 6х/ 12 ) - ( 6у/ 12 ) = - 2
- ( 6х/12 ) + ( х/12 ) - ( 6y/12 ) + ( y/6 ) = - 2 + 2
- ( 5x/12 ) - ( 4y/12 ) = 0
4y = - 5x
y = - 1,25x
0,5x + 0,5•( - 1,25)x = 2
0,5x - 0,625x = 2
- 0,125x = 2
х = - 16
y = - 1,25•( - 16 ) = 20
Ответ ( - 16 ; 20 )