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A father is 4 times older than his son in 20 years he will be twice as old what age are they now?
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\n. \n. \n. Come on, son of the age "x". \n. Thus, the Father's present age is 4x. \n. Now, the question, after 20 years, fathers, age=4x+20 and son's age =x+20 and \n. two times, son,s, age= age of the father as well, \n. 2(x+20)=4x+20 \n. 2x+40=4x+20 \n. 2x=20 \n. x=10 \n. So, son's age is 10 years and the father's age is 4x or 40 years.