A) 2 1/3k=4 1/2* 1 1/9;
7/3k=9/2*10/9;
7/3k=5;
k=5:7/3;
k=5*3/7=15/7=2 1/7.
б) 8 1/2m= 3 2/3* 1 1/11;
17/2m=11/3*12/11;
17/2m=4;
m=4*2/17= 8/17.
в) у:4/5=3 1/8: 1 1/4;
у*5/4=25/8:5/4;
у*5/4=25/8*4/5;
у*5/4=5/2;
у=5/2*4/5;
у=2.
г)z:3/4=3 1/9:4/9;
z*4/3= 28/9*9/4;
z*4/3=7;
z=7*3/4=21/4=5 1/4=5,25.