SOLUTION: A father is four times as old as his daughter is now. In 20 years he will be only twice as old as his daughter. How old are the father and daughter is now?
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Question 170802: A father is four times as old as his daughter is now. In 20 years he will be only twice as old as his daughter. How old are the father and daughter is now? Answer by Mathtut(3670) (Show Source):
You can put this solution on YOUR website! call fathers age f and daughters age d
:
f=4d....eq 1
f+20=2(d+20)..eq 2
:
take f's value from eq 1 and plug it into eq 2 and distribute the right side of eq 2
:
4d+20=2d+40
:
2d=20
: daughters age fathers age
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