3 years ago

In the equality 5/? = ?/20, if each ? Represents the same number, then ? Must equal :

Mathematics

1 answer:

tatiyna3 years ago

3 0

Answer:

? = 10

Step-by-step explanation:

Let " ? " be x.

5 / x = x / 20

x * x = 5 * 20

x² = 100

[ 100 = 10 x 10 = 10² ]

x² = 10²

x = 10

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