Answer:
The roses cost Brad 9 dollars.
Explanation:
We know that Brad bought 3 more daisies than roses. These daisies would've cost Brad 3 dollars.
15.00 - 3.00 = 12.00
Brad now has 12 dollars leftover. Now, we know that there is an equal amount of daisies and roses in addition to the 3 extra daisies. The cost of 1 daisy and 1 rose would be 4 dollars.
12.00/4.00 = 3
This means that he bought 3 of each kind of flower, and 3 extra daisies. To find out how much the 3 roses he bought cost, we lastly multiply 3 x 3.
3 x 3 = 9.
The roses cost Brad 9 dollars.
Hope this helps!