Question 744574
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the present age of a father is equal to the sum of ages of his 5 children. 
12 years hence the sum of ages of his children will be twice the age of their father. 
find the present age of the father.
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Let x be the present age of the father.

According to the problem, x is equal to the sum of the 5 his children, at the same time.


12 years later, the sum of ages of 5 children will be  x+5*12 = x+60 years.

At that time the age of the father will be x+12 years.


The problem says that

    2(x+12) = x + 5*12.


To find x, simplify this equation step by step

    2x + 24 = x + 60

    2x - x = 60 - 24

       x   =    36.


<U>ANSWER</U>.  The father is 36 years old now.
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Solved.