Question

-1 + r >_4 solve it

Answer 1

You have to isolate the variable in order to solve this inequality, and whatever we do to one side has to be done to the other.
Since the 1 on the left side is negative, you have to add 1 to both sides to get rid of it
-1 + 1 = 0
4 + 1 = 5

The final answer would be r>5