Use the same number 3 times

10+10+10=30

The figure shows the easiest way to get a target number, such as 30, from using a same number 3 times in an equation. Can you use a number 3 times to make a target number 20? The number you choose must be less than 11. You can use any mathematical operator as you want

You should be able to make 3 equations. If you make 4 equations you must be a genius!!!