Question 1152085
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Let x be the age of Adam (the value under the question).


Then the age of Jeff is  4x+3 years,  and


    x + (4x+3) = 63,


according to the condition.


Simplify and solve for x


    5x = 63 - 3 = 60

     x          = 60/5 = 12.


<U>ANSWER</U>.  Adam is 12 years old.
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