1 2/3:2,8=2 6/7: х срочно помогите!!!!!
12/3:2,8=26/7:x 4:28/10=26/7:x 4×10/28=26/7:x 10/7=26/7:x x=26/7:10/7 x=26/7:7/10 x=13/5 x=2.6