Question

Jennifer is 3 years older than twice Zack’s age. The sum of their ages is 21. What are their ages?

Answer 1

Jennifer is 15 and Zack is 6

Explanation:

z+ (2z+3)=21

z+2z+3-3=21-3

z+2z=18

3z=18

3z/3=18/3

z=6

so plug 6 in for all the variables and their ages are

Zack-6

Jennifer-15