Question

There are two types of animals in a room some are cat and some are dogs each cat takes 7 biscuits and each dog takes 9 biscuits 355 biscuits are eaten by 45 animals find the number of cays and dogs

Answer 1

cats=25
dogs=20
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Answer 2

Answer:

Hence, Number of cats = 25 and number of dogs = 20

Step-by-step explanation:

Let the numbers of cats be x and number of dogs be y

Number of animals = 45

⇒ x + y = 45

⇒ x = 45 - y ......(1)

Also, each cat take 7 biscuits and each dog take 9 biscuits and total of 355 biscuits are taken

⇒ 7x + 9y = 355

Putting value of x from equation (1)

⇒ 7 (45 - y) + 9y = 355

⇒ 315 - 7y + 9y = 355

⇒ 2y = 40

⇒ y = 20

Also, x = 45 - y

⇒ x = 45 - 20

⇒ x = 25

Hence, Number of cats = 25 and number of dogs = 20