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Vlad1618 [11]
3 years ago
10

The ratio of the number of math books to the number of comic books on a shelf is 7:3. There are 21 comic books on the shelf. Fin

d the number of math books on the shelf.
Mathematics
2 answers:
Sauron [17]3 years ago
7 0

Answer:

There are 49 math books on the shelf.

Step-by-step explanation:

math books : comic books

       7           :         3

       x           :        21

21÷3=7

7*7=49

x=49

NNADVOKAT [17]3 years ago
3 0

Answer:

49

Step-by-step explanation:

Let the number of math books on the shelf be x.

7:3\\x:21

Cross multiply the ratio and solve for x.

3x=7 \times 21\\3x=147\\x=49

There are 49 math books on the shelf.

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