Answer:
dog weighs 48 pounds
Explanation:
let x be the weight of the cat, then the dog weighs 8x ( 8 times as much as dog )
sum the 2 weights and equate to 54
x + 8x = 54 ( simplify left side )
9x = 54 ( divide both sides by 9 )
x = 6
that is the cat weighs 6 pounds
and the dog weights 8x = 8 × 6 = 48 pounds