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polet [3.4K]
3 years ago
10

If 1 is added in numerator and denominator then a fraction changes to 4. If 1 is subtracted from the numerator and denominator,

fraction changes to 7. Numerator of the fraction is
Mathematics
1 answer:
viva [34]3 years ago
7 0

Answer:

N=15

Step-by-step explanation:

N=numerator

D=denominator

(1+N)/(1+D)=4

(N-1)/(D-1)=7

(1+N)=4(1+D)

N=4D+3

(4D+3-1)/(D-1)=7

4D+2=7(D-1)

4D-7D=-2-7

D=-9/-3=3

N=4D+3=15

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