rahul is 30 years younger than his father. 20 years ago,Rahul's father was seven times older than him. what are their current ages?
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Answer: Step-by-step explanation:
Let the age of Rahul be x and that of his father be y
Given rahul is 30 years younger than his father
x+30= y -----------{1} Also
20 years ago,Rahul's father was seven times older than him
y-20=7(x-20) ------------------{2}
From {1}
(x+30)-20=7(x-20)
x+10=7x-140
6x=150
x=25
=> y=x+30=45 Therefore
Age of Rahul = 25 years
Age of Father = 45 years 
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