Jean is five years older than her sister Allison do some of their ages is 13 how old is each girl

Answer 1

OK, your problem statement is a bit messed up. I think it's "Jean is 5 years older than her sister. The sum of their ages is 13. How old is each girl?"

Let x = the sister's age. Jen is 5 years older, so her age is x+5. The sum of their ages is 13:

x + x + 5 = 13

Solve for x, the sister's age. Once you have x, Jen's age is x + 5.