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the denominator of rational no is greater than its numerator by 7. if the mumerator is increased by 17 and the deniminator decreased by 6 ,the new no becomes 2. find the original number |
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Answer» Thus, denominator = (x + 7) Thus, fraction = x/(x+7) According to the question, NEW Numerator = x + 17 New denominator = x + 7 - 6 = x + 1 New Fraction = 2 => (x+17)/(x+1) = 2 On cross-multiplying we get, x + 17 = 2(x+1) => x + 17 = 2x + 2 => 2x - x = 17 - 2 => x = 15 Thus original numerator = 15 and original denominator = 15 + 7 = 22 Thus, original fraction = 15/22 |
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