SOLUTION: If the sum of the ages of a father and his son is 50 in 2012 and presently the difference between their ages is 30.find the ages of the father and his son

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Question 1079256: If the sum of the ages of a father and his son is 50 in 2012 and presently the difference between their ages is 30.find the ages of the father and his son
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
So 5 years ago,
F-5%2BS-5=50
F%2BS-10=50
1.F%2BS=60
and today,
2.F-S=30
Add 1 and 2,
F%2BS%2BF-S=60%2B30
2F=90
Solve for F then use either equation to solve for S.