Answer:
x ≥ 30
Explanation:
30*30 = 900 and when we add 600 to that, we get 1,500 which is the lowest possible number for the left side of the equation to equal. If x equals anything above 30, then it will automatically equal a number greater than 1,500 when added to 600.
(sorry this is confusing, I'm not very good at explaining things. I hope it helped anyway)