Inequalities can be solved in the same way as equations, by performing inverse operations on both sides until the variable is isolated. The only difference is that when you divide or multiply by a negative number, you must reverse the inequality sign. Here, we'll subtract both sides by 4 so the inequality sign doesn't change.
This inequality tells us that all values greater than or equal to -5 will satisfy the inequality. Thus, -5 should be marked as an closed circle and the part to the right represents all values greater than -5.