Question 1167927
Work backwards.
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"Kyle kept 8 of the candies and gave the last 10 to Ben."
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This means Kyle had 18 candies before he gave the last 10 to Ben.
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"Jen ate 1/2 of the candies and gave the rest to Kyle."
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Since we know Kyle had 18 candies, that means Jen had 36 candies before eating half and giving the rest to Kyle.
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The question is, "How many candies did Jen eat?"  From above, we know the answer is 18.  We can stop here.