Answer:
12 weeks.
Step-by-step explanation:
Amanda starts with $2000 and is getting $150 per week which means that we can make the expression:
[tex]2000-150n=200[/tex]
The expression is equal to 200 because is the limit where we can arrive to avoid the fee, then the n is the number of weeks that we are looking for:
[tex]150n=2000-200\\n=\frac{1800}{200}\\n=12[/tex]
n=12 weeks