Question

if 1 is added to the numerator of a fraction,it becomes 1/5; if 1 is taken from the denominator,it becomes 1/7,find the fraction​

Answer 1

x+1/y=1/5

5x+5=y

5x-y=-5-------------(1)

x/y-1=1/7

7x=y-1

7x-y=-1------------(2)

eq(1)-(2)

5x-y=-5

-7x-y=-1

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-2x=-4

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x=2

14-y=-1

y=15

fraction is 2/15