SOLUTION: the average age of a family of eight is 30 years.the average age of six children in the family is 19 years. If the mother is four years younger than the the father. Calculate the a

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Question 723543: the average age of a family of eight is 30 years.the average age of six children in the family is 19 years. If the mother is four years younger than the the father. Calculate the age of the father?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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the average age of a family of eight is 30 years.
the average age of six children in the family is 19 years.
If the mother is four years younger than the the father.
Calculate the age of the father?
:
let f = fathers age
then
(f-4) = mothers age
:
%28f+%2B+%28f-4%29+%2B+6%2819%29%29%2F8 = 30
2f - 4 + 114 = 8(30)
2f + 110 = 240
2f = 240 - 110
2f = 130
f = 65 yrs is the age of the father
:
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You can confirm this solution in the original equation