Answer:
C 3r-12 =15
Step-by-step explanation:
12 rolls eaten + 15 left = total number of rolls
The total number of rolls cam from 3 packages
total rolls =3 packages
12 rolls eaten + 15 left = 3 packages
Let r = number of rolls in a package
12+15 = 3r
Rearranging
Subtract 12 from each side
12+15-12 = 3r-12
15 = 3r-12
Flipping the left and right side
3r-12 =15
