SOLUTION: A man is 4 times as old as his son,if the difference between their aga is 21,what is the son's age?

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Question 1115549: A man is 4 times as old as his son,if the difference between their aga is 21,what is the son's age?

Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Man, 4x
Son, x

4x-x=21
3x=21
x=7