SOLUTION: A father is 4 times as old as his daughter. 5 years ago he was seven times as old as his daughter.Find the present age of the father and the daughter.
What are the 2 equations?
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Question 618888: A father is 4 times as old as his daughter. 5 years ago he was seven times as old as his daughter.Find the present age of the father and the daughter.
What are the 2 equations?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A father is 4 times as old as his daughter.
f = 4d
:
5 years ago he was seven times as old as his daughter.
f - 5 = 7(d-5)
f - 5 = 7d - 35
f = 7d - 35 + 5
f = 7d - 30
:
Just replace f with 4d and find d
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