SOLUTION: The sum of the ages of Farhan and his cousin is 38. Seven years ago, Farhan was thrice as old as his cousin. Find Farhan's present age. Can you show equation to arrive at answ

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Question 1097116: The sum of the ages of Farhan and his cousin is 38. Seven years ago, Farhan was thrice as old as his cousin. Find Farhan's present age.
Can you show equation to arrive at answer of 25?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.F%2BC=38
Seven years ago,
F-7=3%28C-7%29
F-7=3C-21
2.F-3C=-14
Multiply eq. 1 by 3 and add to 2,
3F%2B3C%2BF-3C=114-14
4F=100
Solve for F.