SOLUTION: Jack is Jill's brother. Jack has as many brothers as sisters. Jill has twice as many brothers and sisters. How many children are in the family?

Question 721763: Jack is Jill's brother. Jack has as many brothers as sisters. Jill has twice as many brothers and sisters. How many children are in the family?
Answer by htmentor(1343) (Show Source): You can put this solution on YOUR website!
Let n = the number of brothers and sisters Jack has
Then Jill has n+1 brothers and n-1 sisters
Jill has twice as many brothers as sisters:
n+1 = 2(n-1)
n+1 = 2n-2
n = 3
So Jack has 3 brothers and 3 sisters
Jill has 4 brothers and 2 sisters
Therefore the total number of children is 7.
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