Answer:
4b ≥ $31,380
Step-by-step explanation:
It is known that all accounts have the same amount, so they share the same variable, which we can call the amount in each b. Since there is 4, it's 4b.
We also know, in total, there is at least $31,380 in the accounts. This can be shown in ≥ 31380 (at least this amount).
