18, because cats would be 3, and then the dogs would be 6 times that, which would be 18. 18 + 3 = 21.
Answer: There are 18 dogs.
Step-by-step explanation:
Let x be the number of cats.
Given : There are 6 times as many dogs as cats.
Number of dogs = 6x
If the total number of dogs and cats is 21, then we have
[tex]x+6x=21\\\\\Rightarrow\ 7x=21[/tex]
We divide both sides by 7 , we get
[tex]x=3[/tex]
Now, number of cats = 3
Number of dogs = 6(3)=18
Hence, there are 18 dogs.
