Question

The denominator of a fraction is greater than the numerator by 7 .if 4 is added to both nimerator and denominator then it becomes 21 .find the fraction

Answer 1

let the denominator be y
and the numerator be x

then according to question
y = x+7
then,
x+4/y+4 = 21

put value of y = x+ 7
x+4/x+4+7 = 21

then,
x+4/x+11 = 21

x + 4 = 21x +231
20x = -227

x = -227/20