Ican't find out how to solve these number lines without using decimals, !

Instead of using decimals, you can use this: _,_

ex. 2,8

hope this helped

3-18-33-48-63-78-93
6-16-26-36-46-56
11-18-25-32-39-46-53
14-22-30-38-46-54-62
Make all of your first numbers 0.
So in the first one.
0 _ _ 45 _ _ 90
You subtract 3 from all numbers.
The first gap is 0 too 45.
So divide 45 by gaps including the last number. 0 is first number 45 is last.
45/3=15
0-15-30-45-60-75-90
Now add your 3 back in.
3-18-33-48-63-78-93

Use this formula for all parts.