Three times of a number, 20.5 more than 6.8, find the number. (use equation) How many 205s are subtracted from 2005 to get 160? (using equation) Three fifths of five fifths is 0.1 less than 25% of a number. Find the number

This number is X
3x=6.8+20.5
x=9.1
Subtract x 205 from 2005 to get 160
2005-205x=160
x=9
This number x,
(5/2)*3/5=25%x-1
x=10

It's more than 1 / 3 of a number. The number of 3.8 is 6.8. This is what the number is

Let this number be X
1/3x+3.8=6.8
1/3x=6.8-3.8
1/3x=3
x=9
If you understand and solve your problem,