Present ages of Aasha and Rekha are in the ratio 4 :5. Eight years from now, the ratio of their ages will be 5 : 6. Find their present ages.
The numerator of a rational number is 4 less than its denominator. If 1 is added to both its numerator and denominator, it becomes 2/3. Find the rational number.
Show that x = 4 is a solution of the equation:
Substituting x = 4 in we get
                  LHS = x + 7 -
                         = 4 + 7 -
                         = 11 -
                         =
                     Â
                     RHS =
                            =
                            =
                           Â
                            =
Since,                      LHS = RHS
∴     x = 4 is a solution of the given equation.