SOLUTION: in how many years will a 73 year old grandfather be 5 times as old as his 5 year old grandson

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Question 1188727: in how many years will a 73 year old grandfather be 5 times as old as his 5 year old grandson
Found 3 solutions by josgarithmetic, Solver92311, greenestamps:
Answer by josgarithmetic(39618)   (Show Source):
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Answer by Solver92311(821)   (Show Source):
You can put this solution on YOUR website!

Solve for

John

My calculator said it, I believe it, that settles it

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Answer by greenestamps(13200)   (Show Source):
You can put this solution on YOUR website!

The difference between their ages is 73-5=68 years.

When the grandfather is 5 times as old as his grandson -- i.e., 4 times OLDER THAN -- the grandson's age will be 68/4=17 and the grandfather's age will be 17*5=85.

Since their current ages are 5 and 73, that will be 12 years from now.