Question 1143420
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Darius is X years old.


Jack is (X+87) years old.


11 years ago, Jack was  (X+87-11) = (X+76) years old.


11 years ago, Darius was (X-11) years old.


The equation is


    X+76 = 4*(X-11).


Solve it to get the answer : Darius is 40 years old now.
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<U>Additions</U>


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(a)  Then Jack's age is  40 + 87 = 127 years now.


(b)  <U>CHECK</U>:  11 years ago  Darius was  40-11 = 29 years old;  Jack was  127 - 11 = 116 years old;   {{{116/29}}} = 4,

             so the condition is satisfied and the solution is correct.


             Is it realistic/likelihood or not - it was not asked in the problem, so I do not touch it . . . 


             Formally, my solution is correct.
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