Question

1) х: 2 2/7= 7: 0,8; 2) 6 5/6:4,1 = 6,5:х.

Answer 1

1)х:(2 2/7)=7/0,8     2 2/7=16/7 ;   8/10=4/5
7х/16=7*5/4
х=20

6 5/6=41/6  ; 4 1/10=41/10  ; 6 1/2=13/2 ;
41/6*10/41=6,5/х
5/3=13/(2х)
2х=3*13/5
х=39/10=3,9