Answer:
X>5
Explanation:
Since the initial deposit is given as $2500 then to get more than $4000, Mr. Brown needs additional 4000-2500=$1500
Since each month he deposits $300 then after x months he will have more than $1500 additional.
4000<300x+2500
Collecting like terms
4000-2500<300x
1500<300x
Simplifying
5<x
Or
x>5