А) (9; 3); (18; 6)
Б) (3; 0); (6; 3); (9; 6); (12; 9); (15; 12); (18; 15)
В) (0; 0); (3; 3); (6; 3); (9; 3); (12; 3); (15; 3); (18; 3); (6; 6); (12; 6); (18; 6);
(9; 9); (18; 9); (12; 12); (15; 15); (18; 18)
Графы я не знаю.
2.1/3x-2.1/3=2.1/3
2.1/3x=2.1/3+2.1/3
2.1/3x=4.2/3
x=4.2/3:2.1/3
x=2
Ответ:2
1)-5/18+(-1/6)=-5/18-1/6=-4/9
2)(-4 1/6)/-5/6=(-2 1/3)/-5/12=(-2/3)/-5/12=8/5
1)2 : 2 2/3+1 4/5*3 1/3-2 5/6=3/4+6-2 5/6=6 9/12-2 10/12=5 21/12-2 10/12=3 11/12
2)3 : 3 3/4+2 2/5*2 1/2-3 5/6=4/5+6-3 5/6=6 24/30-3 25/30=5 54/30-3 25/30=2 29/30