Question :
the numerator of a certain fraction is 8 less than the denominator. If 3 is added to the numerator and 3 is subtracted from the denominator, the fraction becomes 3/4. Find the original fraction.
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Step-by-step explanation:
Given:
The numerator of a certain fraction is 8 less than the denominator.
If 3 is added to the numerator and 3 is subtracted from the denominator.
The fraction becomes 3/4.
To find:
The original fraction.
Solution:
Let the numerator of the fraction be:
- x
Then, the denominator will become:
- x + 8
The original fraction will be:
- x/x + 8
As per the conditions:
› x + 3/x + 8 - 3
› x + 3/x + 5 = 3/4
› 4(x + 3) = 3(x + 5)
› 4x + 12 = 3x + 15
› 4x - 3x = 15 - 12
› x = 3
Numerator will be:
- x = 3
Denominator will become:
- x + 8 = 11
The original fraction will be:
- x/x + 8
- 3/3 + 8
- 3/11
∴ The original fraction is 3/11.
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