SOLUTION: The father's age 20 years ago is equal to his son's age 10 from now. If the sum of their ages is 50, how old is each now?

Question 1019531: The father's age 20 years ago is equal to his son's age 10 from now. If the sum of their ages is 50, how old is each now?
Found 2 solutions by josgarithmetic, FrankM:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
f, father now
s, son now

-
substitute:

Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
F-20=S+10
F+S=50
Rearrange first equation
F=S+30
Now substitute -
(S+30)+S=50
S=10
F=40
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