Answer:
In 5 weeks they will have the same amount.
Explanation:
1. You have that Tyronne has $60, she gets $5 each week and also gets an additional $10 each week. She saves her money. Therefore, you can write the following expression:

Where
is the number of weeks.
2. Her sister has $135, she gets $5 each week and also gets an additional $10 each week, but she spends this money. Therefore:

3. If this amounts of money will be equal, you have:

4. Therefore, in 5 weeks they will have the same amount.