5+x=21/4 y:100=3 1/5 z*1/100=0,1 x-2 1/3=5/6 100y=33 1/3 z:1/10=2 2/9

1) 5 + x = 21/4;

х = 21/4 - 5 = 21/4 - 5 * 4/4 = 21/4 - 20/4 = (21 - 20)/4 = 1/4;

2) y : 100 = 3 1/5;

у = (3 * 5 + 1)/5 * 100 = (15 + 1)/5 * 100 = 16/5 * 100 = (16 * 100)/5 = 320.

3) z * 1/100 = 1/10;

z = 100 * 1/10 = 10;

4) x - (2 * 3 + 1)/3 = 5/6;

x = (6 + 1)/3 + 5/6 = 7/3 + 5/6 = 14/6 + 5/6 = (14 + 5)/6 = 19/6;

5) 100 * y = (33 * 3 + 1)/3;

y = (33 * 3 + 1)/3 : 100 = (99 + 1)/300 = 100/300 = 1/3;

6) z : 1/10 = (2 * 9 + 2)/9;

z * 10 = (18 + 2)/9;

z = 20/90 = 2/9.