Keith has $500 in a savings account at the beginning of the summer. He wants to have at least $200 a

Keith has $500 in a savings account at the beginning of the summer. He wants to have at least $200 at the end of the summer. He withdraws $25 per week for food, clothing, and movie tickets. How many weeks can Keith withdraw money from his account

Our account balance is:
500 - 25w where w is the number of weeks.

We want to know the following for w:
500 - 25w = 200

Typing this equation into our search engine, we get:
w = 12