Answer:
Jill paid $225 and cindy paid $75.
Explanation:
From the information given, you can say that the price of Jill's jacket plus the price of Cindy's jacket is equal to 300:
x+y=300 (1), where:
x is the price of Jill's jacket
y is the price of Cindy's jacket
Also, you know that Jill bought a jacket that cost 3 times as much as cindy, which would be:
x=3y (2)
Now you can replace (2) in (1) and solve for y:
3y+y=300
4y=300
y=300/4
y=75
Finally, you can replace the value of y in (2) to find x:
x=3y
x=3*75
x=225
According to this, the answer is that Jill paid $225 and cindy paid $75.