3. Josefina originally had $550 in her checking account. After
withdrawing $100 each week, Josefina has a new balance of $50. Which
best represents w, the number of weeks Josefina withdrew money from
her checking account?
A. 550 - 100w = 50
B. 550 + 100w = 50
C. 50 + 100w = 550
D. 50 - 100w = 550

Josefina started with $550 in her account, and withdrew $100 a week until she had $50 left. With this information you know that 50 will be by itself on one side of the equation as the result, and that any 100w to represent the amount of money Josefina withdrew a week will have a negative sign in front of it. Now, you can use process of elimination to find that the correct answer is A.

3. Josefina originally had $550 in her checking account. After withdrawing $100 each week, Josefina has a new balance of $50. Which best represents w, the number of weeks Josefina withdrew money from her checking account? A. 550 - 100w = 50 B. 550 + 100w = 50 C. 50 + 100w = 550 D. 50 - 100w = 550

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3. Josefina originally had $550 in her checking account. After
withdrawing $100 each week, Josefina has a new balance of $50. Which
best represents w, the number of weeks Josefina withdrew money from
her checking account?
A. 550 - 100w = 50
B. 550 + 100w = 50
C. 50 + 100w = 550
D. 50 - 100w = 550