Question

Jan is one year younger than her brother bill and 1 year old older than her sister sue the sum of the three children's ages is 57 how old is each child

Answer 1

lets say that Jan is \(x\) years old
so age of her bro = \(x+1\)
and
agge of her sis= \(x-1\)

and the sum of these ages is 57 so-

\(x+x+1+x-1=57\)
\((3x=57\)
\(x=19\)
so this means that Jan is 19
her bro is 20
and her sis is 18