SOLUTION: A man is 20 yrs older than his son.In 10 yrs, he will be twice as old as his will be then be.How old is each?

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Question 236833: A man is 20 yrs older than his son.In 10 yrs, he will be twice as old as his will be then be.How old is each?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
Son=x
Dad=x+20
(x+20)+10=2(x+10)
x+30=2x=20
x-2x=20-30
-x=-10
x=10 age of the son now.
10+20=30 age of the dad now.
Proof:
(10+20)+10=2(10+10)
30+10=2*20
40=40