Answer:
4 weeks
Explanation:
We can determine how many more weeks Kyle will need to save than Lisa in order to have enough money to go to the soccer camp that costs $210. We can do this by solving the equation s = 10w + 30 for w when s = 210 to find out how many weeks it will take Kyle to save enough money:
s = 10w + 30 = 210
= 10w + 30 - 30 = 210 -30
= 10w = 180
= 10w = 180/ 10
= w = 18
This means that Kyle will need to save for 18 more weeks in order to have enough money to go to the soccer camp. Since Lisa is saving $15 per week, we can find out how many weeks it will take her to save enough money by dividing the total cost of the camp by her weekly savings: 210 / 15 = 14. This means that Lisa will need to save for 14 weeks in order to have enough money to go to the soccer camp.
Therefore, Kyle will need to save for 18 - 14 = 4 more weeks than Lisa in order to have enough money to go to the soccer camp.