Class 10 NCERT Ex 3-3 Q-2-1 If we add 1 to the numerator and subtract 1 from the denominator..

Class 10 NCERT Ex 3-3 Q-2-1 Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method :
(i) If we add 1 to the numerator and subtract 1 from the denominator, a fraction reduces to 1. It becomes 1/2 if we only add 1 to the denominator. What is the fraction?