Answer:
15 months
Explanation:
Let's x represent the number of months
We Know
Phillip has $100 in the bank and deposits $18 per month.
18x + 100
Gil has $145 in the bank and deposits $15 per month.
15x + 145
For how many months will Gil have a larger bank balance than Phillip?
Let's solve
15x + 145 > 18x + 100
-3x + 145 > 100
-3x > -45
x < 15
So, for 15 months, Gil has a larger bank balance than Phillip.