Question
A father is five times older than his daughter. After 10 years he will be twice as old as his daughter. Find their present ages
Answers
f = 5 d
f+10 = 2(d+10)
so
5 d + 10 = 2 d + 20
f+10 = 2(d+10)
so
5 d + 10 = 2 d + 20
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