Question

Julie has three children whose ages are consecutive odd integers . If x represents the youngest child's age, which expression represents the sum of her children's ages?

Answer 1

Use A,B, and C for the childrens ages.
A (oldest child)
B=A-2
C=A-4
The sum of their ages is A+B+C. Substitute. 
A+(A-2)+(A-4)
3A-6= sum of her childrens ages