SOLUTION: A man is 61 years old and his grandson is 7. In how many years will the man be four times as old as his grandson?

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Question 901930: A man is 61 years old and his grandson is 7. In how many years will the man be four times as old as his grandson?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(61+x)=4*(7+x)
61+x=28+4x
33=3x
x=11
72=4*18