SOLUTION: The average age of a grandmother, a grandfather, and 7 grandchildren is 28. The average age of 7 grandchildren is 15 years. How old is the grandfather, if he is 3 years older than
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Question 935623: The average age of a grandmother, a grandfather, and 7 grandchildren is 28. The average age of 7 grandchildren is 15 years. How old is the grandfather, if he is 3 years older than the grandmother?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
1.
2.
3.
From eq. 2,
Substitute this and eq. 3 into eq. 1,
So then,
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