Jessica is 5 years older than her sister jenna. jenna tells her sister that in 5 years, she will be as old as jessica was 5 years ago. if jenna’s age is x, which equation represents the situation? how many solutions does the equation have?

                          Jenna's age                   Jessica's age

today                         x                               x + 5

in 5 years                 x+5 

5 years ago                                                   x + 5 - 5

Equality                  x + 5 = x + 5 - 5

=> x + 5 = x

The equation is x + 5 = x

That equation has not any solution, because it reduces to 5 = 0, which is an absurd.

So, the conclusion is that information given by Jenna is wrong.

It is logical: if the difference of the ages is 5, in five years Jenna will have 10 years more than what her sister had 5 years ago, no 5 as she told Jessica.