The numerator of a rational number iss maller than it's denominator by 4.If the numerator is increased by 3 and denominator is decreased by 5,the number becomes 2.Find the rational number.
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Given:
- It is given that the numerator of a rational number is smaller than it's denominator by 4.
- When numerator is increased by 3 and denominator is decreased by 5,the number becomes 2.
To Find:
- We need to find the rational number.
Solution:
Let the numerator be x.
According to the question numerator of this rational number is smaller than it's denominator by 4, so denominator will be x + 4.
By Question,
(x + 3)/(x + 4) - 5 = 2
=> (x + 3)/(x - 1) = 2
By cross multiplying the terms, we have
(x + 3) = (x - 1) × 2
= (x + 3) = 2x - 2
=> x = 2x - 2 - 3
=> x = 2x - 5
=> x - 2x = -5
=> -x = -5
=> x = 5
Therefore, numerator(x) = 5 and denominator(x + 4) = 5 + 4 = 9.
Hence the required rational number is 5/9.
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