SOLUTION: Remain is seven times as old as his son. 10 years hence he will be three times as old as his son. What are their present ages in years?

Question 870728: Remain is seven times as old as his son. 10 years hence he will be three times as old as his son. What are their present ages in years?
Found 2 solutions by ewatrrr, josmiceli:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Let x represent the son's age and 7x the father's age NOW
7x + 10 = 3(x+10)
7x + 10 = 3x + 30
4x = 20
x = 5, son's age NOW..Father is NOW 35
checking...10 years from NOW
45 = 3*15
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = his son's age now
= Remain's age now
= his son's age in 10 years
= Remain's age in 10 years
------------------------------------

and

----------------
His son's age now is 5
Remain's age now is 35
-----------------------
check:

OK

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