SOLUTION: A father is four time as old as his daughter. Five years ago he was seven times as old as his daughter. Find the present age of the father and daughter.

Question 820674: A father is four time as old as his daughter. Five years ago he was seven times as old as his daughter. Find the present age of the father and daughter.

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = 4y
x - 5 = 7(y - 5)
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put the system of linear equations into standard form
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x = 4y
x - 4y = 0
x - 5 = 7y - 35
x - 7y = -30
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x - 4y = 0
x - 7y = -30
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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x= 40
y= 10
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answer:
father = 40
daughter = 10
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