rs aggarwal math class 8 chapter 8 soluation

in a fraction twince the numerator is 2 more than the denominator . if 3 is added to the numerator and to the denominator , the new fraction is 2/3 . find the original fraction.

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  1. n / (2n -2)

    (n + 3)/(2n+1) = 2/3

    3(n+3) = 2 (2n+1)

    3 n + 9 = 4n + 2

    n = 7
    so
    n/(2n-2) = 7/12

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    posted by Damon
  2. Let the denominator be x.
    Numerator will= x+2
    If 3 is added,
    Numerator will be x+2+3 = x +5
    Denominator will be x+3
    Now,
    X+5/ x+3 = 2/3
    By cross multiply,
    X+5 × 3 =3x + 15,
    X+3×2=2x + 6,
    Now,
    3x+15=2x+6
    3x-2x=6-15
    X= -9
    Numerator=-9 and denominator=-9×2= -18

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