Question

Ali's dog weighs 8 times as much as her cat. Together the two pets weigh 54 pounds. How much does Ali's dog weigh

Answer 1

The dog will weigh 48 pounds

Answer 2

Ok so lets say D= Dog And C=Cat 
 D+C = 54

D = 8C

Now, substitute 8C for D in the first equation to get: 

8C + C = 54 

Solving for the cat gives us C = 6 

D = 8 x 6 = 48 

Dog Weighs 48 Pounds