on our street there are twice as many cats as dogs .If there are 21 cats and dogs altogether.haw many dogs are there?
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Answer:
No.of dogs=7
Step-by-step explanation:
let's take no. of cats as Nc and no.of dogs as Nd.
given, 2Nd= NC
and NC+Nd= 21
we can write NC. as 2Nd
therefore, 2Nd+Nd=21
3Nd=21
Nd=21/3=7
so, no.of dogs = 7
since cats are twice as many of dogs,
no.of cats= 2(7)= 14
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