Question

Решите восьмой номер.

Answer 1

5≤x<8⇒5/2≤x/2<8/2⇒2,5≤x/2<4
1≤y≤2⇒-2≤-y≤-1
-----------------------
2,5≤x/2<4
-2≤-y≤-1
2,5-2≤x/2-y<4-1
0,5≤x/2-y<3