SOLUTION: Devaughn is 11 years younger than Sydney. The sum of their ages is 39 . What is Sydney's age?

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Question 1064319: Devaughn is
11
years younger than Sydney. The sum of their ages is
39
. What is Sydney's age?
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Devaughn is
11
years younger than Sydney. The sum of their ages is
39
. What is Sydney's age?
======================
S + D = 39
S - D = 11
----------------------- add

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Devaughn is 11 years younger than Sydney.
The sum of their ages is 39 .
What is Sydney's age?
--------------
D = S-11
D+S = 39
-----
Substitute for "D" and solve for "S"::
S-11+S = 39
2S = 50
Sydney = 20 yrs
-------------------
Cheers,
Stan H.
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