In this case, we have the following equation:
6x + 5y-15> = 0
For this case what you should do is to graph the following straight line:
6x + 5y-15 = 0
Then, the solution will be the shaded region that satisfies the following inequality:
6x + 5y-15> = 0
In the shaded region you will find all the solution points.
Answer:
See attached image