<PRE><B>Question 1191937</B>
&lt;br&gt;
The given information compares the ages of both Zac and Lucas to the age of Alex, so use Alex&#39;s age as your starting point.&lt;br&gt;
x = Alex&#39;s age
x-4 = Zac&#39;s age (4 younger than Alex)
2x = Lucas&#39;s age (twice Alex&#39;s age)&lt;br&gt;
The sum of the ages is 64:&lt;br&gt;
(x)+(x-4)+(2x) = 64
4x-4 = 64
4x = 68
x = 17&lt;br&gt;
ANSWER: Alex&#39;s age is x = 17&lt;br&gt;
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