Answer:
if c = 6, the d= 8c = 8(6) = 48.
Step-by-step explanation:
Let c = weight of cat.
Let d = weight of dog.
d = 8c (the dog weights 8 times as much as the cat)
d + c = 54 (together, they weigh 54 pounds)
Substitute 8c for d from the first equation into the second equation:
8c + c = 54
9c = 54
c = 6
if c = 6, the d= 8c = 8(6) = 48.