Question

the numeratorof a fraction is 4 less than the denominator. If 1 is added to both its numerator and denminator , it becomes 1/2. Find the fraction.

Answer 1

Hey! I hope this helps -- x-4/x
                                      =x-4+1/x+1 = 1/2
                                      =x-3/x+1 = 1/2
                                      =2x-6 = x+1 (Cross Multiplication)
                                      =2x-x = 1+6
                                      =x = 7
Therefore, Original fraction is 3/7.