Question 309027: KHALID IS NOW FOUR TIMES AS OLD AS HIS DAUGHTER. TEN YEARS AGO, IF THE SUM OF THEIR AGES WAS SIXTY. FIND THE PRESENT AGE OF HIS DAUGHTER?
Answer by mollukutti(30)   (Show Source):
You can put this solution on YOUR website! Let us consider Khalid's daughter's age as x years
Hence Khalid's present age is 4x
10 years ago daughters age was (x - 10) years
10 years ago Khalid's age was (4x - 10)years
10 years ago the sum of their age was 60.
Hence we can write the linear equation as
(x-10)+(4x -10) = 60
or, x - 10 +4x - 10 = 60
or, 5x - 20 = 60
Let us add 20 to either sides now
or, 5x - 20 + 20 = 60 + 20
or, 5x = 80
or, x = 80/5
or, x = 16
Hence the present age of the daughter is 16 years.
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