Question

Stephen has a dog that weighs 5 times as much as lans dog. The total weight of both dogs is 72 pounds. How many pounds does Stephens dog weigh?

Answer 1

If the lan's dog be X. Let the Stephens dog be 5x while their addition is 72. So [x+5x]=72, the answer is clearly known to be 12

Answer 2

s=steve's dog's weight
i=ian's dog's weight


so steve's dog weighs 5 times of ians dog
s=5 times i
s=5i
total weight=72
s+i=72
we can subsitute 5i for s since s=5i
5i+i=72
add
6i=72
divide by 6
i=12

find s
s+i=72
s+12=72
subtract 12
s=60


weighs 60 pounds