Tell me Sydney's age if Devaughn is 12 years older than Sydney and the sum of their ages is 64.

Tell me Sydney's age if Devaughn is 12 years older than Sydney and the sum of their ages is 64.
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Joel Reese
Let
D= Devaughn's age
S= Sydney's age
So
D+S=64
D=S+12
Now
$D+S=64⇒D=64-S$
and so
S+12=64−S
2S=52
S=26
Therefore
D=S+12
D=38
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