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Question

Clair has 170 stamps in her collection. Her first book of stamps has 30 more stamps in it. How many stamps are in each book?

Answer 1

Hello.

So Clair has 170 stamps altogether and one book has 30 more stamps than the other.

Let's call the number of stamps in the smaller book, X.

Then the number of stamps in the larger book is X + 30.

Now, if you add them together there are 170 stamps.

X + (X + 30) = 170

2X + 30 = 170

2X + 30 - 30 = 170 - 30

2X = 140

2X/2 = 140/2

X = 70

Therefore, there are 70 stamps in the smaller book and 70 + 30 = 100 stamps in the larger book.

Let's check the answers:

70 + 100 = 170 stamps