1) 3/10х = 2 целых 1/4
2) 2/20х = 1 целая 4/5
3) 28/32х = 2 целых 1/6
4) 11/16х = 3/4

1) 3/10х = 2 1/4 x=9/4×10/3x=15/2=7 1/22) 2/20х = 1 4/5 x=9/5×10/1=183) 28/32х = 2 1/6 x=13/6×32/28=208/84=2 10/214) 11/16х = 3/4x=3/4×16/11=12/11=1 1/11