SOLUTION: Sarah is 3 times older than Joe. Their ages added together add up to 16. How old is Sarah?

Question 348905: Sarah is 3 times older than Joe. Their ages added together add up to 16. How old is Sarah?
Found 2 solutions by Fombitz, Alan3354:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let S be Sarah's age and J be Joe's age,

Substitute,

years old
Then

years old
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Sarah is 3 times older than Joe. Their ages added together add up to 16. How old is Sarah?
-------------
3 times older = 4 times as old
S = 4J
S + J = 16
Sub for S
4J + J = 16
5J = 16
J = 3.2
S = 12.8

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