6 more than five times a number x is at least 21

5x+6=21

5*3+6=21

if it can be any number more then 21 it could also be

5x+6=26

5*4+6=26

To answer this inequation, you have to write the following:

6 + 5x = > 21 (we write the 6 more than five times a number x is at least 21)

5x = > 21 - 6 (transfer the 6)

5x = > 15 (calculate this)

x = > 3 (here is the answer)

x = > 3