Question

The numerator of the fraction is 4 less than the denominator. If 1 is added to both it's numerator and denominator, it becomes 1/2 find the fraction
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Answer 1

$let \: the \: fraction \: be \: \frac{a}{b}$

Numerator= denominator-4

a=b−4⇒b−a=4

$so \: here \: it \: can \: be \: \frac{1}{2}$

+1 = 21

2a+2=b+1

2a−b=−1

(2a−b)+(b−a)=4−1

a=3,b=7

$so \: the \: fraction \: is \: \frac{3}{7}$