Question

Andy is four years older than Barbara. Carlos is twice as old as Andy.
If Barbara is ___?___ years old, then Andy is ___?___ years old and Carlos is
___?___ years old.

Answer 1

???

Answer 2

let andy's age be x and barbara's age be y, carlos age be z
x=y+4
z=2x

u can substitute any value of y to find x and z

Answer 3

Let Andy be A
Barbara be B
Carlos be C
A=B+4
C=2A

Answer 4

use trial and error =)
example if we let Carlos be 14yrs old therefore Andy is 7, but Andy is 4 years older than Barbara therefore Barbara is 3yrs old. I hope this will help