SOLUTION: Jack is 4 times as old as Lacy. 8 years from now the sum of their ages will be 81 . How old are they now?

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Question 634099: Jack is 4 times as old as Lacy. 8 years from now the sum of their ages will be 81 . How old are they now?
Answer by graphmatics(170) About Me  (Show Source):
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Let x represent Jack's age and y represent Lacy's age. Then
x=4y
x+8+y+8=81
4y+8+y+8=81
5y=65
y=13 so x=52