Question

Devaughn's age is two times Sydney's age. The sum of their ages is
66. What is Sydney's age?

Answer 1

if you look at the question itself, we know the sum of their ages is 66 and that Devaughn is twice the age of Sydney.

D= 2s

66-2s=s

3s=66

s=22

Sydney is 22, Devaughn is 44, equal to sum of 66

Answer 2

d = devaugn's age
s = sidney's age

so, we know Devaugh's age is twice as Sydneys, so d = 2*s or 2s
and we know their sum is 66
or d + s = 66

since d = 2s, thus

(2s) + s = 66 <--- solve for "s" to see Sidney's age

what about Devaugn's? well d = 2s