>> 9 . . .. . 9
IV. .
1. : ?
2. :
3. X
4. (X) (Y)
1) X - 3; Y - 6 2) X = 3; Y - 5
3) X = 7; Y = 4 4) X - 7; Y = 13
5. (X) (Y) ,
1) = 7; Y = 17 2) X = 7; Y = 18
3) X = 9; Y = 19 4) = 9; Y = 18
6. (X) (Y)
1) X = 15; Y = 31 2) X = 16; Y = 32
3) X = 14; Y = 30 4) X = 12; Y = 24
7. (X) (Y)
1) = 9; Y = 18 2) X = 10; Y = 19
3) X = 8; Y = 17 4) X = 4; Y = 9
8. (X) (Y)
1) X = 25; Y = 54 2) X = 28; Y = 58
3) X = 29; Y = 62 4) X = 23; Y = 50
9. (X) (Y)
1) X = 4; Y = 8 2) X = 4; Y - 10
3) X = 2; Y = 6 4) X = 4; Y = 9
10. (X) (Y)
1) X Y 10; Y = 5 2) X = 5; Y = 12
3) X = 5; Y = 10 4) X = 1; Y = 4