annajett annajett

21-03-2019
Mathematics

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If a number is added to the numerator of 7/8 and the same number is subtracted from the denominator, the result is 4. Find the number.

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remotecontrolbrain remotecontrolbrain

21-03-2019

Answer:

The number is 5.

Step-by-step explanation:

Call the number n. Write the problem as an equation:

[tex]\frac{7+n}{8-n}=4\\7+n=(8-n)4=32-4n\\5n = 25\\n=5[/tex]

The number is 5.

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