3-2=1 men; 6-4=2 women; therefore: one men = two women;

3 m = 6 w;

3 m + 4 w = 6 w + 4 w = 10 w;

10 w = 10 days; 10 w * 10 days = 100 days take the work of one woman;

4 m + 8 w = (4 m * 2) + 8 w = 16 w

100/16 w = 6,25 days take the work of sixteen women;

6,25 - 2 = 4,25 would modify the sixteen women and eight remain twice as long, that is

4,25 + 4,25 = **8,5**